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• #1 Influenza (flu) | Better Health Channel

  https://www.betterhealth.vic.gov.au/node/1236

  Influenza (flu) is a highly contagious viral infection of the respiratory tract that can cause severe illness and life-threatening complications (including pneumonia). It affects people of all ages. The flu is usually spread by breathing in droplets from coughs and sneezes that contain the virus. […] The most common symptoms of the flu are: sudden appearance of a high fever (38C or more), a dry cough, body aches (especially in the head, lower back and legs), feeling extremely weak and tired (and not wanting to get out of bed). […] Symptoms of the flu can hit very quickly and may last several weeks. A bout of the flu typically follows this pattern: Days 1-3: Sudden appearance of fever, headache, muscle pain and weakness, dry cough, sore throat and sometimes a stuffy nose. Day 4: Fever and muscle aches decrease. Hoarse, dry or sore throat, cough and possible mild chest discomfort become more noticeable. You may feel tired or flat. Day 8: Symptoms decrease. Cough and tiredness may last one to two weeks or more.

• #2 Seasonal influenza | Communicable Diseases Agency

  https://www.cda.gov.sg/professionals/diseases/seasonal-influenza

  Seasonal influenza, commonly known as the flu, is an acute respiratory infection caused by influenza viruses. The disease can cause mild to severe illness, sometimes leading to death. […] The signs and symptoms of seasonal influenza range from mild respiratory symptoms to severe illnesses such as pneumonia. Common symptoms include: Fever, chills, Headache, Cough, Sore throat, Muscle aches, General malaise and fatigue, Gastrointestinal symptoms, such as nausea, vomiting, or diarrhoea, more commonly in children. […] In severe cases, influenza can result in pneumonia, hospitalisation or even death, especially in populations at higher risk of developing severe disease.

• #3 Influenza (flu) | Better Health Channel

  https://www.betterhealth.vic.gov.au/node/1236

  Influenza (flu) is a highly contagious viral infection of the respiratory tract that can cause severe illness and life-threatening complications (including pneumonia). It affects people of all ages. The flu is usually spread by breathing in droplets from coughs and sneezes that contain the virus. […] The most common symptoms of the flu are: sudden appearance of a high fever (38C or more), a dry cough, body aches (especially in the head, lower back and legs), feeling extremely weak and tired (and not wanting to get out of bed). […] Symptoms of the flu can hit very quickly and may last several weeks. A bout of the flu typically follows this pattern: Days 1-3: Sudden appearance of fever, headache, muscle pain and weakness, dry cough, sore throat and sometimes a stuffy nose. Day 4: Fever and muscle aches decrease. Hoarse, dry or sore throat, cough and possible mild chest discomfort become more noticeable. You may feel tired or flat. Day 8: Symptoms decrease. Cough and tiredness may last one to two weeks or more.

• #4 Influenza (Flu): Symptoms & Causes | NewYork-Presbyterian

  https://www.nyp.org/primary-care/influenza-flu

  Influenza, also known as the flu, is a respiratory infection caused by a virus that affects the nose, throat, and sometimes the lungs. For some people, flu symptoms can be mild, but for others, the symptoms can be severe and possibly life-threatening. […] Knowing the symptoms of the flu is important so you can receive treatment as early as possible. Signs and symptoms of the influenza virus may include: Fever or feeling feverish/chills, Cough, Sore throat, Sneezing, Runny or stuffy nose, Muscle or body aches, Headache, Fatigue (tiredness), Shortness of breath, Some people may have vomiting and diarrhea (though this is more common in children than adults). […] Most flu symptoms will fade within four to seven days, though some fatigue and weakness may linger for longer. Contact your primary care physician immediately if your symptoms worsen, if you experience ongoing symptoms, or if you are at risk of developing complications due to the flu.

• #5

  https://www.who.int/news-room/fact-sheets/detail/influenza-(seasonal)

  Symptoms of influenza usually begin around 2 days after being infected by someone who has the virus. […] Symptoms include: sudden onset of fever, cough (usually dry), headache, muscle and joint pain, severe malaise (feeling unwell), sore throat, runny nose. […] The cough can be severe and can last 2 weeks or more. […] Most people recover from fever and other symptoms within a week without requiring medical attention. However, influenza can cause severe illness or death, especially in people at high risk. […] In severe cases influenza can lead to pneumonia and sepsis. […] Hospitalization and death due to influenza occur mainly among high-risk groups. […] The time from infection to illness, known as the incubation period, is about 2 days, but ranges from 14 days.

• #6 Influenza – Wikipedia

  https://en.wikipedia.org/wiki/Influenza

  Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle pain, headache, coughing, and fatigue. […] These symptoms begin one to four (typically two) days after exposure to the virus and last for about two to eight days. […] Diarrhea and vomiting can occur, particularly in children. […] Influenza may progress to pneumonia from the virus or a subsequent bacterial infection. […] Other complications include acute respiratory distress syndrome, meningitis, encephalitis, and worsening of pre-existing health problems such as asthma and cardiovascular disease. […] The onset of symptoms is sudden, and initial symptoms are predominately non-specific, including fever, chills, headaches, muscle pain, malaise, loss of appetite, lack of energy, and confusion.

• #7 Flu (Influenza): Causes, Symptoms, Types & Treatment

  https://my.clevelandclinic.org/health/diseases/4335-influenza-flu

  Symptoms of the flu usually come on quickly, and can include: Fever. Chills. Body aches. Cough. Headache. Sore throat. Runny or stuffy nose (congestion). Tiredness or feeling run down. Diarrhea or vomiting (usually only in kids). […] The flu is an illness you get from the influenza virus. It causes symptoms like head and body aches, sore throat, fever and respiratory symptoms, which can be severe. […] Most people are able to manage flu symptoms at home and recover within a few days to a week. […] Flu can last from a few days to two weeks. Symptoms like fever and body aches can come on suddenly but usually go away faster than other symptoms. A cough or runny nose can last longer. […] In a typical flu season in the U.S., its estimated that between 20,000 and 50,000 people die from the flu. Another 300,000 to 500,000 require hospitalization for serious illness.

• #8 Signs and Symptoms of Flu | Influenza (Flu) | CDC

  https://www.cdc.gov/flu/signs-symptoms/index.html

  Flu can cause mild to severe illness. Learn the symptoms of flu. […] Flu symptoms usually come on suddenly. People who have flu often feel some or all of these signs and symptoms: fever* or feeling feverish/chills, cough, sore throat, runny or stuffy nose, muscle or body aches, headaches, fatigue (tiredness), some people may have vomiting and diarrhea, though this is more common in children than adults. […] Most people who get flu will recover in a few days to less than two weeks, but

• #9 Flu | Flu Symptoms | Stomach Flu | Influenza | MedlinePlus

  https://medlineplus.gov/flu.html

  Symptoms of the flu come on suddenly and may include: Fever or feeling feverish/chills […] Cough […] Sore throat […] Runny or stuffy nose […] Muscle or body aches […] Headaches […] Fatigue (tiredness). Some people may also have vomiting and diarrhea. This is more common in children. […] Some people who get the flu will develop complications. Some of these complications can be serious or even life-threatening. They include: Bronchitis […] Ear infection […] Sinus infection […] Pneumonia […] Inflammation of the heart (myocarditis), brain (encephalitis), or muscle tissues (myositis, rhabdomyolysis). The flu also can make chronic health problems worse. For example, people with asthma may have asthma attacks while they have flu. […] Certain people are more likely to have complications from the flu, including: Adults 65 and older […] Pregnant women […] Children younger than 5 […] People with certain chronic health conditions, such as asthma, diabetes, and heart disease.

• #10 Influenza (Flu) Symptoms | Texas DSHS

  https://www.dshs.texas.gov/influenza-flu/influenza-flu-symptoms

  Influenza (also known as the flu) is a contagious respiratory illness caused by flu viruses. It can cause mild to severe illness, and at times can lead to death. The flu is different from a cold. The flu usually comes on suddenly. […] Flu Symptoms Include: Fever* or feeling feverish/chills, Cough, Sore throat, Runny or stuffy nose, Muscle or body aches, Headaches, Fatigue (tiredness), Some people may have vomiting and diarrhea, though this is more common in children than adults. […] *It’s important to note that not everyone with flu will have a fever.

• #11 Flu (Influenza): Causes, Symptoms, Types & Treatment

  https://my.clevelandclinic.org/health/diseases/4335-influenza-flu

  Symptoms of the flu usually come on quickly, and can include: Fever. Chills. Body aches. Cough. Headache. Sore throat. Runny or stuffy nose (congestion). Tiredness or feeling run down. Diarrhea or vomiting (usually only in kids). […] The flu is an illness you get from the influenza virus. It causes symptoms like head and body aches, sore throat, fever and respiratory symptoms, which can be severe. […] Most people are able to manage flu symptoms at home and recover within a few days to a week. […] Flu can last from a few days to two weeks. Symptoms like fever and body aches can come on suddenly but usually go away faster than other symptoms. A cough or runny nose can last longer. […] In a typical flu season in the U.S., its estimated that between 20,000 and 50,000 people die from the flu. Another 300,000 to 500,000 require hospitalization for serious illness.

• #12 Influenza (Flu) Fact Sheet

  https://health.ny.gov/diseases/communicable/influenza/fact_sheet.htm

  Influenza, commonly referred to as the 'flu’, is a severe respiratory illness that is easily spread and can lead to severe complications, even death. Each year in the U.S. on average, influenza and its related complications result in approximately 226,000 hospitalizations and nearly 24,000 deaths. Combined with pneumonia, influenza is the nation’s eighth leading cause of death. […] The „flu” or influenza is a serious disease. At times it can lead to death. It is very contagious and spreads in the U.S. each year, starting in the fall and continuing through spring. […] Unlike a cold, flu symptoms start suddenly. They appear about 1-4 days after a person is exposed to the flu. Symptoms may include: Fever or feeling feverish/chills. Cough. Sore throat. Runny or stuffy nose. Muscle or body aches. Headache. Tiredness. Some people may have vomiting or diarrhea; this is more common in children.

• #13 Influenza (flu) – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/flu/symptoms-causes/syc-20351719

  Flu, also called influenza, is an infection of the nose, throat and lungs, which are part of the respiratory system. The flu is caused by a virus. Symptoms of the flu such as a sore throat and a runny or stuffy nose are common. You may also get these symptoms with other illness such as a cold. But colds tend to start slowly, and the flu tends to come on quickly, within two or three days after you come in contact with the virus. And while a cold can be miserable, you usually feel much worse with the flu. Other common flu symptoms include: Fever. Cough. Headache. Muscle aches. Feeling very tired. Sweating and chills. In children, these symptoms may show up more generally as being fussy or irritable. Children also are more likely than adults to have ear pain, feel sick to the stomach, vomit or have diarrhea with the flu. In some cases, people have eye pain, watery eyes or find that light hurts their eyes. If you have flu symptoms and are at risk of complications, see your healthcare professional right away. Starting antiviral medicine within two days after your symptoms show up may shorten the length of your illness and help prevent more-serious problems. If you have emergency symptoms of the flu, get medical care right away. For adults, emergency symptoms can include: Trouble breathing or shortness of breath. Chest pain or pressure. Ongoing dizziness. Hard to wake up or confusion. Dehydration. Seizures. Worsening of existing medical conditions. Severe weakness or muscle pain. Emergency symptoms in children include all the symptoms seen in adults, as well as: Fast breathing or ribs that pull in with each breath. Gray or blue lips or nail beds. No tears when crying and a dry mouth, along with not needing to urinate. Symptoms, such as fever or cough, that get better but then come back or get worse. If you’re young and healthy, the flu usually isn’t serious. Although you may feel awful while you have it, the flu usually goes away in a week or two with no lasting effects. But people at high risk may develop other health problems after the flu, called complications. Getting another infection can be a complication of getting the flu. That includes illnesses such as croup and sinus or ear infections. Lung infections are another complication. Infection of the heart muscle or heart lining may happen after getting the flu. And in some cases, people may have infection of the central nervous system. Other complications may be: Acute respiratory distress syndrome. Muscle damage, called rhabdomyolysis, or muscle swelling, called myositis. Toxic shock syndrome. Worsening of a chronic illness, such as asthma or kidney disease.

• #14 Flu

  https://www.nhs.uk/conditions/flu/

  Flu symptoms come on very quickly and can include: a sudden high temperature, an aching body, feeling tired or exhausted, a dry cough, a sore throat, a headache, difficulty sleeping, loss of appetite, diarrhoea or tummy pain, feeling sick and being sick. […] The symptoms are similar for children, but they can also get pain in their ear and appear less active. […] Cold and flu symptoms are similar, but flu tends to be more severe. […] Antibiotics do not work for viral infections such as flu. GPs do not recommend antibiotics for flu because they will not relieve your symptoms or speed up your recovery. […] Flu is very infectious and easily spread to other people. You’re more likely to give it to others in the first 5 days. […] Flu is spread by germs from coughs and sneezes, which can live on hands and surfaces for 24 hours.

• #15 Flu Symptoms in Kids: What Parents Need to Know | Texas Children’s

  https://www.texaschildrens.org/content/wellness/flu-symptoms-kids-what-parents-need-know

  Flu season is in full swing, and pediatricians, urgent care clinics and emergency centers are seeing an influx of children with flu symptoms. Recognizing flu symptoms early, especially in kids, is important for ensuring timely care and recovery. […] Flu symptoms can vary, but common signs and symptoms include: Cough, Decreased appetite, Fatigue and tiredness, Fever, Headache, Muscle and body aches, Runny or stuffy nose, Sore throat, Vomiting or diarrhea (more common in children than adults). […] In children, these symptoms often appear suddenly. Closely monitor your child’s condition, as some kids are at higher risk for complications, such as children under 2 and those with chronic or serious medical conditions. […] Flu: Symptoms come on suddenly and are more severe, including high fever, fatigue and body aches.

• #16 Flu Symptoms in Kids: What Parents Need to Know | Texas Children’s

  https://www.texaschildrens.org/content/wellness/flu-symptoms-kids-what-parents-need-know

  Seek immediate emergency care if your child shows severe flu symptoms, such as: Abnormal behavior or unresponsiveness, Difficulty breathing or fast breathing, Persistent vomiting and inability to drink fluids, Poor skin color (pale or bluish), Signs of dehydration (e.g., no urination in over 8 hours, dry lips, no tears while crying), Severe pain. […] Yes. Babies may show subtle signs like poor feeding, lethargy or irritability, while toddlers and older kids are more likely to have classic symptoms like fever and cough. Always consult a pediatrician if you suspect your baby has the flu. […] Flu season typically peaks between December and February, but cases can occur as early as October and as late as May.

• #17 Influenza (flu) – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/flu/symptoms-causes/syc-20351719

  Flu, also called influenza, is an infection of the nose, throat and lungs, which are part of the respiratory system. The flu is caused by a virus. Symptoms of the flu such as a sore throat and a runny or stuffy nose are common. You may also get these symptoms with other illness such as a cold. But colds tend to start slowly, and the flu tends to come on quickly, within two or three days after you come in contact with the virus. And while a cold can be miserable, you usually feel much worse with the flu. Other common flu symptoms include: Fever. Cough. Headache. Muscle aches. Feeling very tired. Sweating and chills. In children, these symptoms may show up more generally as being fussy or irritable. Children also are more likely than adults to have ear pain, feel sick to the stomach, vomit or have diarrhea with the flu. In some cases, people have eye pain, watery eyes or find that light hurts their eyes. If you have flu symptoms and are at risk of complications, see your healthcare professional right away. Starting antiviral medicine within two days after your symptoms show up may shorten the length of your illness and help prevent more-serious problems. If you have emergency symptoms of the flu, get medical care right away. For adults, emergency symptoms can include: Trouble breathing or shortness of breath. Chest pain or pressure. Ongoing dizziness. Hard to wake up or confusion. Dehydration. Seizures. Worsening of existing medical conditions. Severe weakness or muscle pain. Emergency symptoms in children include all the symptoms seen in adults, as well as: Fast breathing or ribs that pull in with each breath. Gray or blue lips or nail beds. No tears when crying and a dry mouth, along with not needing to urinate. Symptoms, such as fever or cough, that get better but then come back or get worse. If you’re young and healthy, the flu usually isn’t serious. Although you may feel awful while you have it, the flu usually goes away in a week or two with no lasting effects. But people at high risk may develop other health problems after the flu, called complications. Getting another infection can be a complication of getting the flu. That includes illnesses such as croup and sinus or ear infections. Lung infections are another complication. Infection of the heart muscle or heart lining may happen after getting the flu. And in some cases, people may have infection of the central nervous system. Other complications may be: Acute respiratory distress syndrome. Muscle damage, called rhabdomyolysis, or muscle swelling, called myositis. Toxic shock syndrome. Worsening of a chronic illness, such as asthma or kidney disease.

• #18 Flu symptoms: Should I see my doctor?

  https://www.mayoclinic.org/diseases-conditions/flu/expert-answers/flu-symptoms/faq-20057983

  Call your healthcare professional if you think you have the flu and you or someone you’re caring for is at high risk of serious flu illness, or flu-related complications. […] Unlike a cold, the flu tends to come on suddenly and makes you feel much worse than a cold. Common symptoms of the flu often include a fever but not always, as well as headache, aching muscles, and chills and sweats. […] Other symptoms include: Dry, persistent cough. Shortness of breath. Tiredness and weakness. Runny or stuffy nose. Sore throat. Eye pain. […] Vomiting and diarrhea also are symptoms of the flu but this is more common in children than adults. […] Complications of flu include pneumonia, sinus or ear infections, bronchitis, and acute respiratory distress syndrome. The flu also can lead to inflammation of the heart, brain or muscles. […] And flu infection can worsen chronic health problems such as asthma and congestive heart failure. These illnesses may need to be treated in the hospital and, rarely, may lead to death.

• #19 Clinical Signs and Symptoms of Influenza | Influenza (Flu) | CDC

  https://www.cdc.gov/flu/hcp/clinical-signs/index.html

  Uncomplicated influenza illness is typically characterized by the abrupt onset of constitutional and upper respiratory tract signs and symptoms (e.g., fever, chills, myalgia, headache, malaise, nonproductive cough, sore throat, and rhinitis). […] Atypical signs and symptoms of influenza virus infection can occur, including in frail, institutionalized elderly long-term care facility residents (e.g., mental status changes). […] Among young children with influenza, nausea, vomiting or diarrhea may also occur with respiratory symptoms. […] Uncomplicated influenza signs and symptoms typically resolve after 3-7 days for the majority of people, although cough and malaise can persist for 2 weeks, especially in older people and those with chronic lung disease.

• #20 Stages of the Flu: Symptoms, Progression, and Recovery

  https://www.volusiamedicalcenter.net/post/stages-of-the-flu-symptoms-progression-and-recovery

  The flu usually goes through different stages, each with its own symptoms and level of severity. Knowing these stages can help you act quickly and handle symptoms better. The stages of the flu are: […] Flu symptoms come on quickly, often in just a few hours, and this stage is usually the most severe. Early signs often include fever, chills, muscle aches, tiredness, sore throat, and headache. This is when the infected person begins to feel ill. […] Symptoms get worse and are at their worst around days 2 to 4, with extreme tiredness, stuffy nose, ongoing cough, and high fever. Some people also feel sick to their stomach or may throw up. This is the hardest part of the flu, and it’s important to rest and drink plenty of fluids during this time. […] Between days 5 and 7, most people begin to get better from the flu. Although symptoms improve, some like a lingering cough and tiredness may remain. Most people recover in a week, but some may need more time, especially if they have weak immune systems or other health issues.

• #21 Influenza: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/219557-overview

  Influenza, one of the most common infectious diseases, is a highly contagious airborne disease that occurs in seasonal epidemics and manifests as an acute febrile illness with variable degrees of systemic symptoms, ranging from mild fatigue to respiratory failure and death. Influenza causes significant loss of workdays, human suffering, and mortality. […] The presentation of influenza virus infection varies, but it usually includes many of the following signs and symptoms: Fever, Sore throat, Myalgias, Frontal or retro-orbital headache, Nasal discharge, Weakness and severe fatigue, Cough and other respiratory symptoms, Tachycardia, Red, watery eyes. […] The incubation period of influenza is 2 days on average but may range from 1 to 4 days. Aerosol transmission may occur 1 day before the onset of symptoms; thus, it may be possible for transmission to occur via asymptomatic persons or persons with subclinical disease, who may be unaware that they have been exposed to the infection.

• #22 Understanding Stages of the Flu | UPMC HealthBeat

  https://share.upmc.com/2023/05/stages-of-the-flu/

  Between fatigue, cough, and fever, flu symptoms can affect your whole body, and they often come on suddenly. Fortunately, the worst part of the flu is usually over in a few days. […] In the early stages of the flu, you dont even know you have it. The virus replicates in your body for one to four days after you get infected. […] Unlike a cold, the flu comes on quickly. On the first day, you may experience a fever, chills, headache, body aches, and cough. Typically, symptoms are the worst in the early stages of flu, which is the first two or three days. […] Many people find their symptoms get better around day four. Those who dont experience any complications from the flu should recover in about a week. […] Some people have a lingering cough for a few weeks after the flu. Cough is especially common in elderly people and those with lung conditions.

• #23 Influenza (Flu) Fact Sheet

  https://health.ny.gov/diseases/communicable/influenza/fact_sheet.htm

  You can pass the flu to others from 1 day before you have symptoms up to 5-7 days after you get sick. Some people might be able to infect others even longer. […] Some complications include pneumonia, ear infections and dehydration. The flu can be serious and may require care in a hospital. Some people who get the flu could die.

• #24 Understanding Stages of the Flu | UPMC HealthBeat

  https://share.upmc.com/2023/05/stages-of-the-flu/

  Between fatigue, cough, and fever, flu symptoms can affect your whole body, and they often come on suddenly. Fortunately, the worst part of the flu is usually over in a few days. […] In the early stages of the flu, you dont even know you have it. The virus replicates in your body for one to four days after you get infected. […] Unlike a cold, the flu comes on quickly. On the first day, you may experience a fever, chills, headache, body aches, and cough. Typically, symptoms are the worst in the early stages of flu, which is the first two or three days. […] Many people find their symptoms get better around day four. Those who dont experience any complications from the flu should recover in about a week. […] Some people have a lingering cough for a few weeks after the flu. Cough is especially common in elderly people and those with lung conditions.

• #25 Influenza (flu) | Better Health Channel

  https://www.betterhealth.vic.gov.au/node/1236

  Influenza (flu) is a highly contagious viral infection of the respiratory tract that can cause severe illness and life-threatening complications (including pneumonia). It affects people of all ages. The flu is usually spread by breathing in droplets from coughs and sneezes that contain the virus. […] The most common symptoms of the flu are: sudden appearance of a high fever (38C or more), a dry cough, body aches (especially in the head, lower back and legs), feeling extremely weak and tired (and not wanting to get out of bed). […] Symptoms of the flu can hit very quickly and may last several weeks. A bout of the flu typically follows this pattern: Days 1-3: Sudden appearance of fever, headache, muscle pain and weakness, dry cough, sore throat and sometimes a stuffy nose. Day 4: Fever and muscle aches decrease. Hoarse, dry or sore throat, cough and possible mild chest discomfort become more noticeable. You may feel tired or flat. Day 8: Symptoms decrease. Cough and tiredness may last one to two weeks or more.

• #26 Stages of the Flu: Symptoms, Progression, and Recovery

  https://www.volusiamedicalcenter.net/post/stages-of-the-flu-symptoms-progression-and-recovery

  The flu usually goes through different stages, each with its own symptoms and level of severity. Knowing these stages can help you act quickly and handle symptoms better. The stages of the flu are: […] Flu symptoms come on quickly, often in just a few hours, and this stage is usually the most severe. Early signs often include fever, chills, muscle aches, tiredness, sore throat, and headache. This is when the infected person begins to feel ill. […] Symptoms get worse and are at their worst around days 2 to 4, with extreme tiredness, stuffy nose, ongoing cough, and high fever. Some people also feel sick to their stomach or may throw up. This is the hardest part of the flu, and it’s important to rest and drink plenty of fluids during this time. […] Between days 5 and 7, most people begin to get better from the flu. Although symptoms improve, some like a lingering cough and tiredness may remain. Most people recover in a week, but some may need more time, especially if they have weak immune systems or other health issues.

• #27 Influenza (flu) | Better Health Channel

  https://www.betterhealth.vic.gov.au/node/1236

  Influenza (flu) is a highly contagious viral infection of the respiratory tract that can cause severe illness and life-threatening complications (including pneumonia). It affects people of all ages. The flu is usually spread by breathing in droplets from coughs and sneezes that contain the virus. […] The most common symptoms of the flu are: sudden appearance of a high fever (38C or more), a dry cough, body aches (especially in the head, lower back and legs), feeling extremely weak and tired (and not wanting to get out of bed). […] Symptoms of the flu can hit very quickly and may last several weeks. A bout of the flu typically follows this pattern: Days 1-3: Sudden appearance of fever, headache, muscle pain and weakness, dry cough, sore throat and sometimes a stuffy nose. Day 4: Fever and muscle aches decrease. Hoarse, dry or sore throat, cough and possible mild chest discomfort become more noticeable. You may feel tired or flat. Day 8: Symptoms decrease. Cough and tiredness may last one to two weeks or more.

• #28 Stages of the Flu: Symptoms, Progression, and Recovery

  https://www.volusiamedicalcenter.net/post/stages-of-the-flu-symptoms-progression-and-recovery

  The flu usually goes through different stages, each with its own symptoms and level of severity. Knowing these stages can help you act quickly and handle symptoms better. The stages of the flu are: […] Flu symptoms come on quickly, often in just a few hours, and this stage is usually the most severe. Early signs often include fever, chills, muscle aches, tiredness, sore throat, and headache. This is when the infected person begins to feel ill. […] Symptoms get worse and are at their worst around days 2 to 4, with extreme tiredness, stuffy nose, ongoing cough, and high fever. Some people also feel sick to their stomach or may throw up. This is the hardest part of the flu, and it’s important to rest and drink plenty of fluids during this time. […] Between days 5 and 7, most people begin to get better from the flu. Although symptoms improve, some like a lingering cough and tiredness may remain. Most people recover in a week, but some may need more time, especially if they have weak immune systems or other health issues.

• #29 Stages of Flu: Symptoms & Doctor Visit Guide – Healthcare Associates of Texas

  https://healthcareassociates.com/what-are-the-stages-of-the-flu/

  The flu affects an average of 8% of people in the U.S. every year. Everyone experiences the flu differently. Some people may have mild symptoms and get over their illness within a few days, while others may have more severe symptoms that last a few weeks. […] Day 1 is typically when you start experiencing flu symptoms. Your body has recognized that it has been infected with the flu and may start releasing antibodies to fight the virus. This process can trigger inflammation, which contributes to common flu symptoms, including fever and headache. […] Flu symptoms usually peak and are at their worst on days 2 and 3. You may not feel well enough to get out of bed and should stay home from work or school to recover and avoid spreading the virus to others. […] On days 4 and 5 of the flu, your symptoms may start going away, and you’ll feel much better than you did on days 2 and 3. However, you may still feel too weak to do anything but sleep and relax.

• #30 Stages of the Flu: Symptoms, Progression, and Recovery

  https://www.volusiamedicalcenter.net/post/stages-of-the-flu-symptoms-progression-and-recovery

  The flu usually goes through different stages, each with its own symptoms and level of severity. Knowing these stages can help you act quickly and handle symptoms better. The stages of the flu are: […] Flu symptoms come on quickly, often in just a few hours, and this stage is usually the most severe. Early signs often include fever, chills, muscle aches, tiredness, sore throat, and headache. This is when the infected person begins to feel ill. […] Symptoms get worse and are at their worst around days 2 to 4, with extreme tiredness, stuffy nose, ongoing cough, and high fever. Some people also feel sick to their stomach or may throw up. This is the hardest part of the flu, and it’s important to rest and drink plenty of fluids during this time. […] Between days 5 and 7, most people begin to get better from the flu. Although symptoms improve, some like a lingering cough and tiredness may remain. Most people recover in a week, but some may need more time, especially if they have weak immune systems or other health issues.

• #31 Understanding Stages of the Flu | UPMC HealthBeat

  https://share.upmc.com/2023/05/stages-of-the-flu/

  Between fatigue, cough, and fever, flu symptoms can affect your whole body, and they often come on suddenly. Fortunately, the worst part of the flu is usually over in a few days. […] In the early stages of the flu, you dont even know you have it. The virus replicates in your body for one to four days after you get infected. […] Unlike a cold, the flu comes on quickly. On the first day, you may experience a fever, chills, headache, body aches, and cough. Typically, symptoms are the worst in the early stages of flu, which is the first two or three days. […] Many people find their symptoms get better around day four. Those who dont experience any complications from the flu should recover in about a week. […] Some people have a lingering cough for a few weeks after the flu. Cough is especially common in elderly people and those with lung conditions.

• #32 Influenza (flu) | Better Health Channel

  https://www.betterhealth.vic.gov.au/node/1236

  Influenza (flu) is a highly contagious viral infection of the respiratory tract that can cause severe illness and life-threatening complications (including pneumonia). It affects people of all ages. The flu is usually spread by breathing in droplets from coughs and sneezes that contain the virus. […] The most common symptoms of the flu are: sudden appearance of a high fever (38C or more), a dry cough, body aches (especially in the head, lower back and legs), feeling extremely weak and tired (and not wanting to get out of bed). […] Symptoms of the flu can hit very quickly and may last several weeks. A bout of the flu typically follows this pattern: Days 1-3: Sudden appearance of fever, headache, muscle pain and weakness, dry cough, sore throat and sometimes a stuffy nose. Day 4: Fever and muscle aches decrease. Hoarse, dry or sore throat, cough and possible mild chest discomfort become more noticeable. You may feel tired or flat. Day 8: Symptoms decrease. Cough and tiredness may last one to two weeks or more.

• #33 Stages of the Flu: Symptoms, Progression, and Recovery

  https://www.volusiamedicalcenter.net/post/stages-of-the-flu-symptoms-progression-and-recovery

  The flu usually goes through different stages, each with its own symptoms and level of severity. Knowing these stages can help you act quickly and handle symptoms better. The stages of the flu are: […] Flu symptoms come on quickly, often in just a few hours, and this stage is usually the most severe. Early signs often include fever, chills, muscle aches, tiredness, sore throat, and headache. This is when the infected person begins to feel ill. […] Symptoms get worse and are at their worst around days 2 to 4, with extreme tiredness, stuffy nose, ongoing cough, and high fever. Some people also feel sick to their stomach or may throw up. This is the hardest part of the flu, and it’s important to rest and drink plenty of fluids during this time. […] Between days 5 and 7, most people begin to get better from the flu. Although symptoms improve, some like a lingering cough and tiredness may remain. Most people recover in a week, but some may need more time, especially if they have weak immune systems or other health issues.

• #34 Stages of Flu: Symptoms & Doctor Visit Guide – Healthcare Associates of Texas

  https://healthcareassociates.com/what-are-the-stages-of-the-flu/

  The flu affects an average of 8% of people in the U.S. every year. Everyone experiences the flu differently. Some people may have mild symptoms and get over their illness within a few days, while others may have more severe symptoms that last a few weeks. […] Day 1 is typically when you start experiencing flu symptoms. Your body has recognized that it has been infected with the flu and may start releasing antibodies to fight the virus. This process can trigger inflammation, which contributes to common flu symptoms, including fever and headache. […] Flu symptoms usually peak and are at their worst on days 2 and 3. You may not feel well enough to get out of bed and should stay home from work or school to recover and avoid spreading the virus to others. […] On days 4 and 5 of the flu, your symptoms may start going away, and you’ll feel much better than you did on days 2 and 3. However, you may still feel too weak to do anything but sleep and relax.

• #35 Stages of the Flu: Symptoms, Progression, and Recovery

  https://www.volusiamedicalcenter.net/post/stages-of-the-flu-symptoms-progression-and-recovery

  Some people might feel tired for one to two weeks after the main flu symptoms go away. During this time, they may still feel weak and exhausted. Getting enough rest and drinking plenty of fluids are important to get your strength back and help your body recover completely from the flu. […] The most common flu symptoms are: […] A sudden high fever (typically over 100.4F or 38C) is a hallmark symptom of the flu. Chills and sweating often accompany the fever, which can make you feel very hot or cold. A sudden high fever, chills, and sweating are all common symptoms of the flu. […] A persistent, dry, or productive cough is a common symptom of the flu and may last for weeks, even after other symptoms subside. The cough may be dry, which means there is no mucus, or productive, which means there is mucus.

• #36 How long does the flu last? – Harvard Health

  https://www.health.harvard.edu/staying-healthy/how-long-does-the-flu-last

  Few common illnesses are more unpleasant than the flu. The aches and pains, chills, fever, and cough are bad enough; add in the other potential symptoms of flu, including runny nose, vomiting, diarrhea, fatigue, or sore throat, and you’ll want the illness to be over as soon as possible. Symptoms usually appear from one to four days after exposure to the virus, and they last five to seven days. For people who’ve had a flu shot, the symptoms may last a shorter amount of time, or be less severe. For other people, the symptoms may last longer. Even when symptoms resolve, you may continue to feel fatigued. […] People in those groups may have weakened immune systems, and are at increased risk to develop complications, including pneumonia. […] These steps won’t guarantee that you’ll escape the flu this year, but they may help prevent it. And they may help reduce the amount of time the flu lasts if you do become infected with the virus.

• #37 Influenza (Seasonal Flu) | Kaiser Permanente

  https://healthy.kaiserpermanente.org/health-wellness/health-encyclopedia/he.influenza-seasonal-flu.hw122012

  Influenza (flu) is an infection from a virus. It can cause a fever, body aches, a headache, and a cough. It is contagious and usually lasts about a week or two. Flu symptoms are usually worse than a cold and last longer. The flu usually doesn’t cause vomiting or diarrhea in adults. […] Flu symptoms may include fever, body aches, a headache, a dry cough, and a sore or dry throat. You’ll probably feel tired and less hungry than usual. The symptoms are usually worse for the first few days. But it can take up to a few weeks to get completely better. […] The symptoms of influenza (flu) appear suddenly. They often include: Fever. Fever is usually continuous, but it may come and go. Fever may be lower in older adults than in children and younger adults. Body aches and muscle pain (often severe). A headache. Pain when you move your eyes. Fatigue, a general feeling of sickness, and loss of appetite. A dry cough, a runny nose, and a dry or sore throat. Symptoms are usually worse for the first few days. But it can take up to a few weeks to get completely better.

• #38 Influenza (flu) | Better Health Channel

  https://www.betterhealth.vic.gov.au/node/1236

  Influenza (flu) is a highly contagious viral infection of the respiratory tract that can cause severe illness and life-threatening complications (including pneumonia). It affects people of all ages. The flu is usually spread by breathing in droplets from coughs and sneezes that contain the virus. […] The most common symptoms of the flu are: sudden appearance of a high fever (38C or more), a dry cough, body aches (especially in the head, lower back and legs), feeling extremely weak and tired (and not wanting to get out of bed). […] Symptoms of the flu can hit very quickly and may last several weeks. A bout of the flu typically follows this pattern: Days 1-3: Sudden appearance of fever, headache, muscle pain and weakness, dry cough, sore throat and sometimes a stuffy nose. Day 4: Fever and muscle aches decrease. Hoarse, dry or sore throat, cough and possible mild chest discomfort become more noticeable. You may feel tired or flat. Day 8: Symptoms decrease. Cough and tiredness may last one to two weeks or more.

• #39 Flu: MedlinePlus Medical EncyclopediaLock

  https://medlineplus.gov/ency/article/000080.htm

  The flu (influenza) is a viral respiratory illness that causes fever, chills, runny nose, body aches, and cough. It spreads easily from person to person. The flu can cause moderate to severe symptoms. Most people recover fully. Children, older adults, and people with certain health conditions are at risk for severe illness and even death. […] Flu symptoms often start quickly. You can start to feel sick about 1 to 7 days after you come in contact with the virus. Most of the time, symptoms appear within 2 to 3 days. […] The first symptom is often a fever between 100°F (37.8°C) and 104°F (40°C) that comes on suddenly. An adult often has a lower fever than a child. But not everyone with the flu has a fever. […] Other common symptoms include: Body aches, Chills, Headache, Lack of energy, Cough, Runny or stuffy nose, Sneezing, Sore throat, Nausea, vomiting and diarrhea (more common in children).

• #40 Influenza (Flu) – Infections – Merck Manual Consumer Version

  https://www.merckmanuals.com/home/infections/respiratory-viruses/influenza-flu

  Influenza often starts with chills, followed by a fever, muscle aches, headache, a sore throat, a cough, a runny nose, and a general feeling of illness. […] Symptoms of influenza start 1 to 4 days after infection and can begin suddenly. Chills or a chilly sensation is often the first indication. Fever is common during the first few days, sometimes reaching 102 to 103 F (about 39 C). Many people feel so ill, weak, and tired that they remain in bed for days. They have aches and pains throughout the body, particularly in the back and legs. Headache is often severe, with aching around and behind the eyes. Bright light may make the headache worse. […] At first, respiratory symptoms may be relatively mild. They may include a scratchy sore throat, a burning sensation in the chest, a dry cough, and a runny nose. Later, the cough can become severe and bring up phlegm (sputum).

• #41 Flu: MedlinePlus Medical EncyclopediaLock

  https://medlineplus.gov/ency/article/000080.htm

  Fever usually goes away in 3 to 4 days but may last up to 8 days. Other symptoms get better in 7 to 14 days. The cough and tired feeling may last for weeks. Sometimes, the fever comes back. […] The flu can make asthma, breathing problems, and other long-term (chronic) illnesses and conditions worse.

• #42 Clinical Signs and Symptoms of Influenza | Influenza (Flu) | CDC

  https://www.cdc.gov/flu/hcp/clinical-signs/index.html

  Uncomplicated influenza illness is typically characterized by the abrupt onset of constitutional and upper respiratory tract signs and symptoms (e.g., fever, chills, myalgia, headache, malaise, nonproductive cough, sore throat, and rhinitis). […] Atypical signs and symptoms of influenza virus infection can occur, including in frail, institutionalized elderly long-term care facility residents (e.g., mental status changes). […] Among young children with influenza, nausea, vomiting or diarrhea may also occur with respiratory symptoms. […] Uncomplicated influenza signs and symptoms typically resolve after 3-7 days for the majority of people, although cough and malaise can persist for 2 weeks, especially in older people and those with chronic lung disease.

• #43 Flu

  https://www.nhs.uk/conditions/flu/

  Flu symptoms come on very quickly and can include: a sudden high temperature, an aching body, feeling tired or exhausted, a dry cough, a sore throat, a headache, difficulty sleeping, loss of appetite, diarrhoea or tummy pain, feeling sick and being sick. […] The symptoms are similar for children, but they can also get pain in their ear and appear less active. […] Cold and flu symptoms are similar, but flu tends to be more severe. […] Antibiotics do not work for viral infections such as flu. GPs do not recommend antibiotics for flu because they will not relieve your symptoms or speed up your recovery. […] Flu is very infectious and easily spread to other people. You’re more likely to give it to others in the first 5 days. […] Flu is spread by germs from coughs and sneezes, which can live on hands and surfaces for 24 hours.

• #44 Flu or Cold? Know the Differences

  https://www.webmd.com/cold-and-flu/flu-cold-symptoms

  Flu symptoms are usually more severe than cold symptoms and come on quickly. Symptoms of flu include sore throat, fever, headache, muscle aches and soreness, congestion, and cough. Swine flu in particular is also associated with vomiting and diarrhea. […] Most flu symptoms gradually improve over two to five days, but it’s not uncommon to feel run down for a week or more. A common complication of the flu is pneumonia, particularly in the young, elderly, or people with lung or heart problems. If you notice shortness of breath, let your doctor know. Another common sign of pneumonia is a fever that comes back after having been gone for a day or two. […] Flu symptoms often mimic cold symptoms with nasal congestion, cough, aches, and malaise. But a common cold rarely has symptoms of fever above 101 degrees. With flu symptoms, you will probably have a fever initially with the flu virus and you will feel miserable. Body and muscle aches are also more common with the flu.

• #45 Influenza (Flu) > Fact Sheets > Yale Medicine

  https://www.yalemedicine.org/conditions/flu

  Symptoms include fever of 100.4 F or higher, aching muscles, chills, sweats, headache. […] The flu is a contagious viral infection that attacks the respiratory system (throat, nose, and lungs). The degree of illness can range from mild to severe and can include fever, body aches, cough, headache, and sore throat. […] Common symptoms of the flu may include the following: Fever of 100.4 F or higher, Aching muscles, especially in your back, arms, and legs, Chills and sweats, Headache, Cough, Runny or stuffy nose, Sore throat, Fatigue and weakness. […] At first, it may be hard to distinguish between a common cold and the flu. But one difference is that colds tend to come on somewhat gradually, whereas the flu usually develops more suddenly. […] Basically, you are sicker with the flu compared to a standard upper-respiratory infection. Its like a cold on steroids, says Dr. Cameron. Your fever is higher. Your symptoms last longer. You are miserable and achy. […] Flu symptoms are also similar to those caused by COVID-19. Testing is necessary to know whether you have flu or COVID-19 (or another respiratory illness). […] In rare cases, patients with flu might not have any symptoms, so one should not self-diagnose their illness based on symptoms alone.

• #46 Influenza (flu) – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/flu/symptoms-causes/syc-20351719

  Flu, also called influenza, is an infection of the nose, throat and lungs, which are part of the respiratory system. The flu is caused by a virus. Symptoms of the flu such as a sore throat and a runny or stuffy nose are common. You may also get these symptoms with other illness such as a cold. But colds tend to start slowly, and the flu tends to come on quickly, within two or three days after you come in contact with the virus. And while a cold can be miserable, you usually feel much worse with the flu. Other common flu symptoms include: Fever. Cough. Headache. Muscle aches. Feeling very tired. Sweating and chills. In children, these symptoms may show up more generally as being fussy or irritable. Children also are more likely than adults to have ear pain, feel sick to the stomach, vomit or have diarrhea with the flu. In some cases, people have eye pain, watery eyes or find that light hurts their eyes. If you have flu symptoms and are at risk of complications, see your healthcare professional right away. Starting antiviral medicine within two days after your symptoms show up may shorten the length of your illness and help prevent more-serious problems. If you have emergency symptoms of the flu, get medical care right away. For adults, emergency symptoms can include: Trouble breathing or shortness of breath. Chest pain or pressure. Ongoing dizziness. Hard to wake up or confusion. Dehydration. Seizures. Worsening of existing medical conditions. Severe weakness or muscle pain. Emergency symptoms in children include all the symptoms seen in adults, as well as: Fast breathing or ribs that pull in with each breath. Gray or blue lips or nail beds. No tears when crying and a dry mouth, along with not needing to urinate. Symptoms, such as fever or cough, that get better but then come back or get worse. If you’re young and healthy, the flu usually isn’t serious. Although you may feel awful while you have it, the flu usually goes away in a week or two with no lasting effects. But people at high risk may develop other health problems after the flu, called complications. Getting another infection can be a complication of getting the flu. That includes illnesses such as croup and sinus or ear infections. Lung infections are another complication. Infection of the heart muscle or heart lining may happen after getting the flu. And in some cases, people may have infection of the central nervous system. Other complications may be: Acute respiratory distress syndrome. Muscle damage, called rhabdomyolysis, or muscle swelling, called myositis. Toxic shock syndrome. Worsening of a chronic illness, such as asthma or kidney disease.

• #47 Flu symptoms: Should I see my doctor?

  https://www.mayoclinic.org/diseases-conditions/flu/expert-answers/flu-symptoms/faq-20057983

  Call your healthcare professional if you think you have the flu and you or someone you’re caring for is at high risk of serious flu illness, or flu-related complications. […] Unlike a cold, the flu tends to come on suddenly and makes you feel much worse than a cold. Common symptoms of the flu often include a fever but not always, as well as headache, aching muscles, and chills and sweats. […] Other symptoms include: Dry, persistent cough. Shortness of breath. Tiredness and weakness. Runny or stuffy nose. Sore throat. Eye pain. […] Vomiting and diarrhea also are symptoms of the flu but this is more common in children than adults. […] Complications of flu include pneumonia, sinus or ear infections, bronchitis, and acute respiratory distress syndrome. The flu also can lead to inflammation of the heart, brain or muscles. […] And flu infection can worsen chronic health problems such as asthma and congestive heart failure. These illnesses may need to be treated in the hospital and, rarely, may lead to death.

• #48 Flu | Flu Symptoms | Stomach Flu | Influenza | MedlinePlus

  https://medlineplus.gov/flu.html

  Symptoms of the flu come on suddenly and may include: Fever or feeling feverish/chills […] Cough […] Sore throat […] Runny or stuffy nose […] Muscle or body aches […] Headaches […] Fatigue (tiredness). Some people may also have vomiting and diarrhea. This is more common in children. […] Some people who get the flu will develop complications. Some of these complications can be serious or even life-threatening. They include: Bronchitis […] Ear infection […] Sinus infection […] Pneumonia […] Inflammation of the heart (myocarditis), brain (encephalitis), or muscle tissues (myositis, rhabdomyolysis). The flu also can make chronic health problems worse. For example, people with asthma may have asthma attacks while they have flu. […] Certain people are more likely to have complications from the flu, including: Adults 65 and older […] Pregnant women […] Children younger than 5 […] People with certain chronic health conditions, such as asthma, diabetes, and heart disease.

• #49 Influenza – Wikipedia

  https://en.wikipedia.org/wiki/Influenza

  These are usually accompanied by respiratory symptoms such as a dry cough, sore or dry throat, hoarse voice, and a stuffy or runny nose. […] Coughing is the most common symptom. […] Gastrointestinal symptoms may also occur, including nausea, vomiting, diarrhea, and gastroenteritis, especially in children. […] The standard influenza symptoms typically last for two to eight days. […] Some studies suggest influenza can cause long-lasting symptoms in a similar way to long COVID. […] Symptomatic infections are usually mild and limited to the upper respiratory tract, but progression to pneumonia is relatively common. […] Pneumonia may be caused by the primary viral infection or a secondary bacterial infection. […] Primary pneumonia is characterized by rapid progression of fever, cough, labored breathing, and low oxygen levels that cause bluish skin.

• #50 Content – Health Encyclopedia – University of Rochester Medical Center

  https://www.urmc.rochester.edu/encyclopedia/content?contenttypeid=85&contentid=P00625

  Influenza (flu) is an easily spread respiratory tract infection. The flu usually starts abruptly, with fever, muscle aches, sore throat, and a cough. Symptoms usually start suddenly. People usually become very sick with several, or all, of these symptoms: Cough, often becoming severe, Extreme exhaustion, Fatigue for several weeks, Headache, High fever, Runny or stuffy nose, Severe aches and pains, Sneezing at times, Sometimes a sore throat, Vomiting and diarrhea. Fever and body aches often last for 3 to 7 days. But cough and fatigue may last for 2 weeks or more. The symptoms of the flu may look like other health problems. Always talk with your healthcare provider for a diagnosis. […] The flu can cause ear and sinus infections. Flu can make chronic conditions worse. For example, it can cause flares in people with asthma. A serious complication of the flu is pneumonia. Other possible serious complications include infection and inflammation of the heart (myocarditis), brain (encephalitis), or muscles (myositis or rhabdomyolysis). Flu can sometimes cause a life-threatening inflammation in the body called sepsis. Sepsis is a medical emergency. […] The flu is treated with rest, plenty of fluids, and medicines to treat discomfort and fever. Antiviral medicines taken within the first 2 days of illness can reduce the length and severity of the disease. They may also reduce the risk of complications in those at high risk.

• #51 Influenza – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK459363/

  Influenza has enormous morbidity. Many individuals have to take time off work and school. Further, in children and seniors, the infection can lead to death. Mortality rates are higher in people with pre-existing lung disease and diabetes. Overall, the condition can seriously limit the quality of life for 1 to 2 weeks each season. […] Complications can include the following: Secondary bacterial pneumonia, Acute respiratory distress syndrome, Myositis, Myocarditis, Multiorgan failure.

• #52 Influenza (flu) – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/flu/symptoms-causes/syc-20351719

  Flu, also called influenza, is an infection of the nose, throat and lungs, which are part of the respiratory system. The flu is caused by a virus. Symptoms of the flu such as a sore throat and a runny or stuffy nose are common. You may also get these symptoms with other illness such as a cold. But colds tend to start slowly, and the flu tends to come on quickly, within two or three days after you come in contact with the virus. And while a cold can be miserable, you usually feel much worse with the flu. Other common flu symptoms include: Fever. Cough. Headache. Muscle aches. Feeling very tired. Sweating and chills. In children, these symptoms may show up more generally as being fussy or irritable. Children also are more likely than adults to have ear pain, feel sick to the stomach, vomit or have diarrhea with the flu. In some cases, people have eye pain, watery eyes or find that light hurts their eyes. If you have flu symptoms and are at risk of complications, see your healthcare professional right away. Starting antiviral medicine within two days after your symptoms show up may shorten the length of your illness and help prevent more-serious problems. If you have emergency symptoms of the flu, get medical care right away. For adults, emergency symptoms can include: Trouble breathing or shortness of breath. Chest pain or pressure. Ongoing dizziness. Hard to wake up or confusion. Dehydration. Seizures. Worsening of existing medical conditions. Severe weakness or muscle pain. Emergency symptoms in children include all the symptoms seen in adults, as well as: Fast breathing or ribs that pull in with each breath. Gray or blue lips or nail beds. No tears when crying and a dry mouth, along with not needing to urinate. Symptoms, such as fever or cough, that get better but then come back or get worse. If you’re young and healthy, the flu usually isn’t serious. Although you may feel awful while you have it, the flu usually goes away in a week or two with no lasting effects. But people at high risk may develop other health problems after the flu, called complications. Getting another infection can be a complication of getting the flu. That includes illnesses such as croup and sinus or ear infections. Lung infections are another complication. Infection of the heart muscle or heart lining may happen after getting the flu. And in some cases, people may have infection of the central nervous system. Other complications may be: Acute respiratory distress syndrome. Muscle damage, called rhabdomyolysis, or muscle swelling, called myositis. Toxic shock syndrome. Worsening of a chronic illness, such as asthma or kidney disease.

• #53 Influenza – Wikipedia

  https://en.wikipedia.org/wiki/Influenza

  Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle pain, headache, coughing, and fatigue. […] These symptoms begin one to four (typically two) days after exposure to the virus and last for about two to eight days. […] Diarrhea and vomiting can occur, particularly in children. […] Influenza may progress to pneumonia from the virus or a subsequent bacterial infection. […] Other complications include acute respiratory distress syndrome, meningitis, encephalitis, and worsening of pre-existing health problems such as asthma and cardiovascular disease. […] The onset of symptoms is sudden, and initial symptoms are predominately non-specific, including fever, chills, headaches, muscle pain, malaise, loss of appetite, lack of energy, and confusion.

• #54 Flu | Flu Symptoms | Stomach Flu | Influenza | MedlinePlus

  https://medlineplus.gov/flu.html

  Symptoms of the flu come on suddenly and may include: Fever or feeling feverish/chills […] Cough […] Sore throat […] Runny or stuffy nose […] Muscle or body aches […] Headaches […] Fatigue (tiredness). Some people may also have vomiting and diarrhea. This is more common in children. […] Some people who get the flu will develop complications. Some of these complications can be serious or even life-threatening. They include: Bronchitis […] Ear infection […] Sinus infection […] Pneumonia […] Inflammation of the heart (myocarditis), brain (encephalitis), or muscle tissues (myositis, rhabdomyolysis). The flu also can make chronic health problems worse. For example, people with asthma may have asthma attacks while they have flu. […] Certain people are more likely to have complications from the flu, including: Adults 65 and older […] Pregnant women […] Children younger than 5 […] People with certain chronic health conditions, such as asthma, diabetes, and heart disease.

• #55 Flu Facts | Washington State Department of Health

  https://doh.wa.gov/you-and-your-family/illness-and-disease-z/flu/flu-facts

  The flu is a disease caused by flu viruses that infects the nose, throat, and lungs. It can cause moderate to severe illness, including death. […] What are the symptoms of flu? People with flu often have: Fever, Cough, Sore throat, Runny or stuffy nose, Body aches, Fatigue (tiredness), Headache, Vomiting or diarrhea (this is more common in kids than adults). […] If you or someone you know has these symptoms and they are severe, contact your doctor, nurse, or clinic as soon as possible. The best way to tell if you have flu is for a health care provider to swab your throat and have a lab confirm the diagnosis. […] The flu is unpredictable and can be severe, especially for older people, young kids, pregnant people, and people with certain health conditions. These groups are at a greater risk for serious flu-related complications, including: Pneumonia, Ear infections, Sinus infections, Loss of fluids (dehydration), Worsening of chronic medical conditions (asthma, congestive heart failure, or diabetes).

• #56 Influenza (flu) and your baby | March of Dimes

  https://www.marchofdimes.org/find-support/topics/parenthood/influenza-flu-and-your-baby

  Complications from flu in children younger than 5 years old include: Making chronic health conditions, like heart disease or asthma, worse. Brain problems, like encephalopathy. Encephalopathy is any brain disease that affects the brains structure or how the brain works. Dehydration. This means not having enough water in your body. Pneumonia. This is an infection in one or both lungs. Sinus problems and ear infections. Sinus infections can happen when fluid builds up in the sinuses. Death. Flu complications can sometimes lead to death, but this is rare. […] If your baby has any of these signs and symptoms of the flu, call your baby’s health care provider right away or take him to see his provider: Being very tired or sleepy (also called fatigue), Cough, Fever (100 F or above), chills or body shakes. Not everyone who has the flu has a fever. Headache, or muscle or body aches, Runny or stuffy nose, Sore throat, Vomiting (throwing up) or diarrhea.

• #57 Influenza (flu) – Symptoms and causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/flu/symptoms-causes/syc-20351719

  Flu, also called influenza, is an infection of the nose, throat and lungs, which are part of the respiratory system. The flu is caused by a virus. Symptoms of the flu such as a sore throat and a runny or stuffy nose are common. You may also get these symptoms with other illness such as a cold. But colds tend to start slowly, and the flu tends to come on quickly, within two or three days after you come in contact with the virus. And while a cold can be miserable, you usually feel much worse with the flu. Other common flu symptoms include: Fever. Cough. Headache. Muscle aches. Feeling very tired. Sweating and chills. In children, these symptoms may show up more generally as being fussy or irritable. Children also are more likely than adults to have ear pain, feel sick to the stomach, vomit or have diarrhea with the flu. In some cases, people have eye pain, watery eyes or find that light hurts their eyes. If you have flu symptoms and are at risk of complications, see your healthcare professional right away. Starting antiviral medicine within two days after your symptoms show up may shorten the length of your illness and help prevent more-serious problems. If you have emergency symptoms of the flu, get medical care right away. For adults, emergency symptoms can include: Trouble breathing or shortness of breath. Chest pain or pressure. Ongoing dizziness. Hard to wake up or confusion. Dehydration. Seizures. Worsening of existing medical conditions. Severe weakness or muscle pain. Emergency symptoms in children include all the symptoms seen in adults, as well as: Fast breathing or ribs that pull in with each breath. Gray or blue lips or nail beds. No tears when crying and a dry mouth, along with not needing to urinate. Symptoms, such as fever or cough, that get better but then come back or get worse. If you’re young and healthy, the flu usually isn’t serious. Although you may feel awful while you have it, the flu usually goes away in a week or two with no lasting effects. But people at high risk may develop other health problems after the flu, called complications. Getting another infection can be a complication of getting the flu. That includes illnesses such as croup and sinus or ear infections. Lung infections are another complication. Infection of the heart muscle or heart lining may happen after getting the flu. And in some cases, people may have infection of the central nervous system. Other complications may be: Acute respiratory distress syndrome. Muscle damage, called rhabdomyolysis, or muscle swelling, called myositis. Toxic shock syndrome. Worsening of a chronic illness, such as asthma or kidney disease.

• #58 Understanding Stages of the Flu | UPMC HealthBeat

  https://share.upmc.com/2023/05/stages-of-the-flu/

  A flu can worsen underlying diseases, like heart disease, asthma, or diabetes. Some people with the flu also need hospital care because of dehydration. In addition, the flu can infect the lungs, leading to pneumonia. […] If you experience any of the following signs of flu complications, seek medical care right away: Difficulty breathing. Chest pain (including chest pain with coughing or breathing). Seizures. Extreme weakness (an inability to get out of bed, for instance). Signs of dehydration (like a dry mouth and little to no urination). Dizziness or confusion. Signs an underlying health condition is getting worse.

• #59 Influenza Fact Sheet

  https://health.maryland.gov/phpa/pages/influenza.aspx

  In adults: High or prolonged fever, Difficulty breathing or shortness of breath, Pain or pressure in the chest or abdomen, Sudden dizziness, Severe or persistent vomiting, Flu-like symptoms improve but then return with fever and worse cough, Worsening of underlying chronic medical conditions, Confusion.

• #60 Influenza (Flu) Facts – MN Dept. of Health

  https://www.web.health.state.mn.us/diseases/flu/basics/flufacts.html

  Flu symptoms include fever, dry cough, sore throat, headache, extreme tiredness, and body aches. Not everyone will have a fever or experience all of these symptoms. Symptoms usually begin suddenly and might be severe enough to stop your daily activities. […] Flu can result in serious health problems like pneumonia, bacterial infections, and hospitalization. […] Seek immediate medical care if you have: Difficulty breathing or shortness of breath. Pain or pressure in the chest or abdomen. Sudden dizziness. Confusion. Severe or persistent vomiting. Flu-like symptoms that improve but return with worse fever and cough.

• #61 About Influenza (Flu) | Wisconsin Department of Health Services

  https://www.dhs.wisconsin.gov/influenza/about.htm

  Emergency warning signs and symptoms in adults include difficulty breathing or shortness of breath, pain or pressure in the chest or abdomen, sudden dizziness, confusion, severe vomiting, flu-like symptoms that improve but then return with a fever and worse cough, kidney failure, and liver disease. […] Emergency warning signs and symptoms in children and infants include fast breathing or trouble breathing, bluish skin color, not drinking enough fluids, not waking up or not interacting, irritability, flu-like symptoms that improve but then return with a fever and worse cough, high fever with a rash, being unable to eat, no tears when crying, and significantly fewer wet diapers than normal.

• #62 Influenza Fact Sheet

  https://health.maryland.gov/phpa/pages/influenza.aspx

  Influenza is a viral infection of the lungs and airways that is also known as the flu. […] Symptoms of influenza might be confused with the common cold. […] These symptoms include: Fever (100F or greater), Cough, Sore throat, Fatigue or tiredness, Chills, Body aches, Stuffy or runny nose, Headache. […] Symptoms usually start 1 to 3 days after being exposed to the influenza virus. Most persons feel better after several days but cough and tiredness may last two weeks or more. […] Look out for emergency warning signs that require urgent medical attention. […] In children: High or prolonged fever, Fast breathing or trouble breathing, Bluish or gray skin color, Not drinking enough fluids (dehydration), Severe or persistent vomiting, Flu-like symptoms improve but then return with fever and worse cough, Worsening of underlying chronic medical conditions, Changes in mental status, such as not waking up or not interacting; or seizures, Fever with a rash.

• #63 Flu Symptoms in Kids: What Parents Need to Know | Texas Children’s

  https://www.texaschildrens.org/content/wellness/flu-symptoms-kids-what-parents-need-know

  Seek immediate emergency care if your child shows severe flu symptoms, such as: Abnormal behavior or unresponsiveness, Difficulty breathing or fast breathing, Persistent vomiting and inability to drink fluids, Poor skin color (pale or bluish), Signs of dehydration (e.g., no urination in over 8 hours, dry lips, no tears while crying), Severe pain. […] Yes. Babies may show subtle signs like poor feeding, lethargy or irritability, while toddlers and older kids are more likely to have classic symptoms like fever and cough. Always consult a pediatrician if you suspect your baby has the flu. […] Flu season typically peaks between December and February, but cases can occur as early as October and as late as May.

• #64 About Influenza (Flu) | Wisconsin Department of Health Services

  https://www.dhs.wisconsin.gov/influenza/about.htm

  Emergency warning signs and symptoms in adults include difficulty breathing or shortness of breath, pain or pressure in the chest or abdomen, sudden dizziness, confusion, severe vomiting, flu-like symptoms that improve but then return with a fever and worse cough, kidney failure, and liver disease. […] Emergency warning signs and symptoms in children and infants include fast breathing or trouble breathing, bluish skin color, not drinking enough fluids, not waking up or not interacting, irritability, flu-like symptoms that improve but then return with a fever and worse cough, high fever with a rash, being unable to eat, no tears when crying, and significantly fewer wet diapers than normal.

• #65 Influenza (flu) | Better Health Channel

  https://www.betterhealth.vic.gov.au/node/1236

  In some cases of the flu, severe illness and complications (such as pneumonia and bronchitis) can develop. This can result in hospitalisation and even death. […] The flu is a viral infection so antibiotics won’t help and should not be taken. Antiviral medications, if started in the first 2 days after symptoms start, can shorten the length of your illness. These need to be prescribed by your doctor.

• #66 Influenza – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK459363/

  Influenza is a communicable viral disease that affects the upper and lower respiratory tract. Symptoms of influenza include a runny nose, high fever, cough, and sore throat. […] The acute symptoms persist for seven to ten days, and the disease is self-limited in most healthy individuals. […] The clinical presentation of influenza ranges between mild to severe depending on the age, comorbidities, vaccination status, and natural immunity to the virus. Signs and symptoms of influenza in mild cases include a cough, fever, sore throat, myalgia, headache, runny nose, and congested eyes. Severe cases may progress to shortness of breath, tachycardia, hypotension, and the need for supportive respiratory interventions in as little as 48 hours. […] Influenza infection is self-limited and mild in most healthy individuals who do not have other comorbidities. No antiviral treatment is needed during mild infections in healthy individuals.

• #67 Flu (influenza): Symptoms and treatment – Canada.ca

  https://www.canada.ca/en/public-health/services/diseases/flu-influenza.html

  Flu symptoms may vary from person to person. Some people get mildly ill. Others get very sick. Flu symptoms generally appear 1 to 4 days after exposure to the virus. Symptoms usually include the sudden appearance of: fever, cough, muscle aches and pain. Other common symptoms may include: chills, tiredness, headache, sore throat, loss of appetite, runny or stuffy nose. Some people (especially children) may also have: diarrhea, nausea and vomiting. You are contagious from the day before your first symptoms until about 5 days after your first symptoms. Children and people with weakened immune systems may be contagious for longer. Most people recover from the flu in 7 to 10 days. If you’re at higher risk and you develop symptoms, contact a health care provider for advice. Flu symptoms can improve with: rest, fluids, like water, over-the-counter medication to reduce fever or aches. In some cases, a health care provider may prescribe specific medication against the flu (for example, antivirals), especially if you’re: very sick with severe symptoms, at higher risk for complications.

• #68 Flu (influenza) – influenza A and B, symptoms, vaccine | healthdirect

  https://www.healthdirect.gov.au/flu

  Influenza (the flu) is a viral infection that causes fever and chills, sneezing, coughing and a sore throat. […] The symptoms of flu may include: fever and chills, cough, sore throat, sneezing and stuffy or runny nose, tiredness, headache, muscle aches and joint pains. […] Sometimes you may also have: abdominal (tummy) pain, nausea, vomiting. […] These symptoms are more common in children with the flu. […] It’s possible to get flu even if you have been vaccinated. This may be due to your illness being caused by a flu strain not covered by this year’s vaccine. […] Most people will get better by themselves within 7 to 10 days and without any treatment. […] Some things you can do to ease your flu symptoms are: getting plenty of rest, drinking plenty of fluids to prevent dehydration, keeping warm.

• #69 Influenza (flu) | Better Health Channel

  https://www.betterhealth.vic.gov.au/node/1236

  In some cases of the flu, severe illness and complications (such as pneumonia and bronchitis) can develop. This can result in hospitalisation and even death. […] The flu is a viral infection so antibiotics won’t help and should not be taken. Antiviral medications, if started in the first 2 days after symptoms start, can shorten the length of your illness. These need to be prescribed by your doctor.

• #70 Flu

  https://www.nhs.uk/conditions/flu/

  Flu symptoms come on very quickly and can include: a sudden high temperature, an aching body, feeling tired or exhausted, a dry cough, a sore throat, a headache, difficulty sleeping, loss of appetite, diarrhoea or tummy pain, feeling sick and being sick. […] The symptoms are similar for children, but they can also get pain in their ear and appear less active. […] Cold and flu symptoms are similar, but flu tends to be more severe. […] Antibiotics do not work for viral infections such as flu. GPs do not recommend antibiotics for flu because they will not relieve your symptoms or speed up your recovery. […] Flu is very infectious and easily spread to other people. You’re more likely to give it to others in the first 5 days. […] Flu is spread by germs from coughs and sneezes, which can live on hands and surfaces for 24 hours.

• #71 Influenza (Flu) in Children | Children’s Hospital of Philadelphia

  https://www.chop.edu/conditions-diseases/influenza-flu-children

  Influenza (flu) is a highly contagious viral respiratory illness occurring in annual outbreaks, usually during the winter season. […] The most common symptoms of flu are: Fever, Muscle aches, Sore throat, Nonproductive cough. […] Children usually become suddenly ill with any or all of the following symptoms: Fever, which may be as high as 103 F (39.4 C) to 105 F (40.5 C), Muscle and joint aches and pains, Not feeling well „all over”, Headache, Sore throat, Runny or stuffy nose, Worsening cough, Nausea, Vomiting, Diarrhea, Fatigue. […] Most people recover from influenza within a week, but they often feel exhausted for as long as 3 to 4 weeks. In addition, the cough may be prolonged. […] The symptoms of influenza may resemble other conditions or medical problems. Always see your child’s healthcare provider for a diagnosis. […] Antiviral drugs may decrease the severity of symptoms and shorten the course of illness. They may also prevent serious complications, such as pneumonia. […] Studies show that antiviral medications for flu work best when they are started within two days of the onset of symptoms.

• #72 Flu (influenza) – influenza A and B, symptoms, vaccine | healthdirect

  https://www.healthdirect.gov.au/flu

  Your doctor may suggest antiviral medicines if you’re at risk of severe illness. Anti-viral medicines help to shorten the length of your illness and reduce your risk of complications. […] Anti-viral treatments are most effective when given within 48 hours of you getting symptoms. […] If you are sick with the flu, stay home and avoid close contact with other people until you feel better. […] The best way to prevent the flu is to have a flu vaccination every year.

• #73 Flu Facts | Washington State Department of Health

  https://doh.wa.gov/you-and-your-family/illness-and-disease-z/flu/flu-facts

  It’s important that antiviral drugs be used early to treat people who are: Very sick with the flu (for example people who are in the hospital). Sick with the flu and at high-risk for serious flu complications (either because of their age or because they have a high-risk medical condition). […] If you have severe flu symptoms, contact your doctor, nurse, or clinic as soon as possible, especially if you are at high risk of developing flu-related complications. The best way to tell if you have flu is for a health care provider to swab your throat and have a lab confirm the diagnosis. If you have the flu, your provider may prescribe antiviral drugs for treatment.

• #74 Influenza (flu) and your baby | March of Dimes

  https://www.marchofdimes.org/find-support/topics/parenthood/influenza-flu-and-your-baby

  Your babys provider may prescribe an antiviral medicine to prevent or treat the flu. An antiviral is a medicine that kills infections caused by viruses. Antivirals can make your babys flu milder and help your baby feel better faster. Antivirals also can help prevent serious flu complications, like a lung infection called pneumonia. For flu, antivirals work best if used within 2 days of having signs or symptoms. […] If your baby has the flu, help them get lots of rest and drink plenty of fluids. Your baby may not want to eat much. Try giving small meals to help your baby get better.

• #75 Content – Health Encyclopedia – University of Rochester Medical Center

  https://www.urmc.rochester.edu/encyclopedia/content?contenttypeid=85&contentid=P00625

  Influenza (flu) is an easily spread respiratory tract infection. The flu usually starts abruptly, with fever, muscle aches, sore throat, and a cough. Symptoms usually start suddenly. People usually become very sick with several, or all, of these symptoms: Cough, often becoming severe, Extreme exhaustion, Fatigue for several weeks, Headache, High fever, Runny or stuffy nose, Severe aches and pains, Sneezing at times, Sometimes a sore throat, Vomiting and diarrhea. Fever and body aches often last for 3 to 7 days. But cough and fatigue may last for 2 weeks or more. The symptoms of the flu may look like other health problems. Always talk with your healthcare provider for a diagnosis. […] The flu can cause ear and sinus infections. Flu can make chronic conditions worse. For example, it can cause flares in people with asthma. A serious complication of the flu is pneumonia. Other possible serious complications include infection and inflammation of the heart (myocarditis), brain (encephalitis), or muscles (myositis or rhabdomyolysis). Flu can sometimes cause a life-threatening inflammation in the body called sepsis. Sepsis is a medical emergency. […] The flu is treated with rest, plenty of fluids, and medicines to treat discomfort and fever. Antiviral medicines taken within the first 2 days of illness can reduce the length and severity of the disease. They may also reduce the risk of complications in those at high risk.

• #76 Flu symptoms: Should I see my doctor?

  https://www.mayoclinic.org/diseases-conditions/flu/expert-answers/flu-symptoms/faq-20057983

  Call your healthcare professional if you think you have the flu and you or someone you’re caring for is at high risk of serious flu illness, or flu-related complications. […] Unlike a cold, the flu tends to come on suddenly and makes you feel much worse than a cold. Common symptoms of the flu often include a fever but not always, as well as headache, aching muscles, and chills and sweats. […] Other symptoms include: Dry, persistent cough. Shortness of breath. Tiredness and weakness. Runny or stuffy nose. Sore throat. Eye pain. […] Vomiting and diarrhea also are symptoms of the flu but this is more common in children than adults. […] Complications of flu include pneumonia, sinus or ear infections, bronchitis, and acute respiratory distress syndrome. The flu also can lead to inflammation of the heart, brain or muscles. […] And flu infection can worsen chronic health problems such as asthma and congestive heart failure. These illnesses may need to be treated in the hospital and, rarely, may lead to death.

• #77 Flu (Influenza): Causes, Symptoms, and Treatment

  https://patient.info/infections/influenza-and-flu-like-illness

  Most people recover completely from flu in 2-7 days. Typically, symptoms are at their worst after 1-2 days. Then they usually gradually ease over several days. An irritating cough may persist for a week or so after other symptoms have gone. […] Flu is passed from person to person by droplets created when someone with the infection sneezes or coughs. You can also catch it by touching a surface where the virus has been deposited. Flu can spread quickly in these ways. […] Other serious illnesses can have similar symptoms to flu (influenza) when they first develop – for example, meningitis, malaria, or pneumonia. If you have a more serious illness, other symptoms usually develop in addition to those mentioned above. […] Most people with flu don’t need to see a doctor, and can treat their symptoms at home until they feel better. The main treatment is time – the body’s immune system will eventually get rid of the infection.

• #78 Flu Symptoms in Kids: What Parents Need to Know | Texas Children’s

  https://www.texaschildrens.org/content/wellness/flu-symptoms-kids-what-parents-need-know

  If you’re unsure, talk to your pediatrician to confirm whether it’s the flu or another illness. […] Your doctor may prescribe antiviral medications, such as Tamiflu or Relenza, to lessen symptoms, shorten the duration of the illness by 1 or 2 days and prevent complications and hospitalizations. […] For most kids, flu symptoms can be managed at home with proper care. […] Ensure your child drinks plenty of fluids to stay hydrated. Dehydration is a common risk with the flu. […] Encourage plenty of rest to help your child’s body recover. […] Certain situations call for a visit to the pediatrician, especially if your child: Is at high risk for flu complications (for example, if they’re under 2 years old or have chronic medical conditions like asthma or diabetes), Shows prolonged or worsening flu symptoms, Might benefit from antiviral medications like Tamiflu, which are most effective when started within 48 hours of symptoms starting.

• #79 Influenza (Flu) Fact Sheet

  https://health.ny.gov/diseases/communicable/influenza/fact_sheet.htm

  You can pass the flu to others from 1 day before you have symptoms up to 5-7 days after you get sick. Some people might be able to infect others even longer. […] Some complications include pneumonia, ear infections and dehydration. The flu can be serious and may require care in a hospital. Some people who get the flu could die.

• #80 How long is the flu contagious? | Norton Healthcare Louisville, Ky.

  https://nortonhealthcare.com/news/how-long-is-flu-contagious-after-fever-breaks/

  Influenza, or flu, is an upper respiratory infection caused by a virus. It affects the nose, lungs and throat. This influenza is not the same as a stomach flu, which may cause vomiting, nausea and diarrhea. Most people recover on their own from influenza. Sometimes, the flu and its complications can be deadly. There is a flu vaccination, which can reduce your risk of getting the flu and the severity of flu symptoms. Common flu symptoms include: Fever, although not everyone with flu has a fever, Cough, Chills and sweating, Muscle aches, Fatigue, Sore throat, Runny nose. Symptoms come on suddenly with flu. Common cold symptoms build more gradually over time. Flu takes one to four days to incubate in your system after you come into contact with the virus. You have the potential to spread flu before symptom appear. You are contagious for about three to seven days after symptoms appear. An infected person can spread flu even if they never develop symptoms severe enough to notice they are sick. Overall, you can be contagious or were contagious the day before you noticed any symptoms. You still can spread the flu for about a week after you started feeling sick or as long as you have symptoms. Most flu symptoms go away in four to seven days for otherwise healthy adults, but you still may be contagious.

• #81 Flu (influenza): Symptoms and treatment – Canada.ca

  https://www.canada.ca/en/public-health/services/diseases/flu-influenza.html

  Flu symptoms may vary from person to person. Some people get mildly ill. Others get very sick. Flu symptoms generally appear 1 to 4 days after exposure to the virus. Symptoms usually include the sudden appearance of: fever, cough, muscle aches and pain. Other common symptoms may include: chills, tiredness, headache, sore throat, loss of appetite, runny or stuffy nose. Some people (especially children) may also have: diarrhea, nausea and vomiting. You are contagious from the day before your first symptoms until about 5 days after your first symptoms. Children and people with weakened immune systems may be contagious for longer. Most people recover from the flu in 7 to 10 days. If you’re at higher risk and you develop symptoms, contact a health care provider for advice. Flu symptoms can improve with: rest, fluids, like water, over-the-counter medication to reduce fever or aches. In some cases, a health care provider may prescribe specific medication against the flu (for example, antivirals), especially if you’re: very sick with severe symptoms, at higher risk for complications.

• #82 Flu (influenza): Symptoms and treatment – Canada.ca

  https://www.canada.ca/en/public-health/services/diseases/flu-influenza.html

  Flu symptoms may vary from person to person. Some people get mildly ill. Others get very sick. Flu symptoms generally appear 1 to 4 days after exposure to the virus. Symptoms usually include the sudden appearance of: fever, cough, muscle aches and pain. Other common symptoms may include: chills, tiredness, headache, sore throat, loss of appetite, runny or stuffy nose. Some people (especially children) may also have: diarrhea, nausea and vomiting. You are contagious from the day before your first symptoms until about 5 days after your first symptoms. Children and people with weakened immune systems may be contagious for longer. Most people recover from the flu in 7 to 10 days. If you’re at higher risk and you develop symptoms, contact a health care provider for advice. Flu symptoms can improve with: rest, fluids, like water, over-the-counter medication to reduce fever or aches. In some cases, a health care provider may prescribe specific medication against the flu (for example, antivirals), especially if you’re: very sick with severe symptoms, at higher risk for complications.

• #83 Flu

  https://www.nhs.uk/conditions/flu/

  Flu symptoms come on very quickly and can include: a sudden high temperature, an aching body, feeling tired or exhausted, a dry cough, a sore throat, a headache, difficulty sleeping, loss of appetite, diarrhoea or tummy pain, feeling sick and being sick. […] The symptoms are similar for children, but they can also get pain in their ear and appear less active. […] Cold and flu symptoms are similar, but flu tends to be more severe. […] Antibiotics do not work for viral infections such as flu. GPs do not recommend antibiotics for flu because they will not relieve your symptoms or speed up your recovery. […] Flu is very infectious and easily spread to other people. You’re more likely to give it to others in the first 5 days. […] Flu is spread by germs from coughs and sneezes, which can live on hands and surfaces for 24 hours.

• #84 Stages of the Flu: Symptoms, Progression, and Recovery

  https://www.volusiamedicalcenter.net/post/stages-of-the-flu-symptoms-progression-and-recovery

  Vomiting and diarrhea happen more often in children with the flu, but adults can get them too. These symptoms are not as common as others, but they can still happen in some people with the flu. […] The flu has a typical course, starting with incubation, then peak symptoms, and finally recovery. Most people get better in about a week, but tiredness and cough may last longer. Taking care of yourself, like resting, drinking fluids, and managing symptoms, can help you recover faster. […] Most cases of the flu resolve within 5 to 7 days, but fatigue and cough may persist for up to two weeks after the initial symptoms have subsided. This is common and does not necessarily indicate that the flu is getting worse.

• #85 How to treat the flu at home in 6 easy steps | HealthPartners Blog

  https://www.healthpartners.com/blog/what-to-do-if-you-have-the-flu/

  When you start to feel sick, it seems sudden. And if you’re like many people, the first symptoms you notice may be fever or chills, which are followed quickly by headache, muscle aches, cough and/or extreme tiredness. […] Usually, the flu lasts for about 7-10 days. But it’s not uncommon for the tiredness and fatigue symptoms to last 1-2 weeks longer as your body continues to recover.

• #86 How long does the flu last? – Harvard Health

  https://www.health.harvard.edu/staying-healthy/how-long-does-the-flu-last

  Few common illnesses are more unpleasant than the flu. The aches and pains, chills, fever, and cough are bad enough; add in the other potential symptoms of flu, including runny nose, vomiting, diarrhea, fatigue, or sore throat, and you’ll want the illness to be over as soon as possible. Symptoms usually appear from one to four days after exposure to the virus, and they last five to seven days. For people who’ve had a flu shot, the symptoms may last a shorter amount of time, or be less severe. For other people, the symptoms may last longer. Even when symptoms resolve, you may continue to feel fatigued. […] People in those groups may have weakened immune systems, and are at increased risk to develop complications, including pneumonia. […] These steps won’t guarantee that you’ll escape the flu this year, but they may help prevent it. And they may help reduce the amount of time the flu lasts if you do become infected with the virus.

• #87 Influenza (Flu) | Sepsis Alliance

  https://www.sepsis.org/sepsisand/influenza-flu/

  People who are vaccinated but still contract the flu usually have fewer or less severe symptoms than those who are unvaccinated. They also have a lower risk of developing complications, like sepsis. According to the CDC, vaccinated adults have a significantly lower risk of being admitted to the intensive care unit (ICU), spend fewer days in the hospital if they do become too ill to stay at home, and have a lower risk of death.

• #88 Health: Infectious Disease Epidemiology & Prevention Division: Influenza/Flu

  https://www.in.gov/health/idepd/respiratory-disease/influenza/

  However, if you have symptoms of flu and are at an increased risk for complications or are very sick, a healthcare provider can prescribe antiviral medication if diagnosed at the beginning of illness onset. Antiviral therapies include, oseltamivir, zanamivir, peramivir, or baloxavir marboxil. […] The best way not to get flu is to get a flu shot every year before the flu season starts. Since flu viruses change over time, it is important to get a shot each year. Each year the vaccine is remade to include the types of flu viruses scientist think will be around to cause illness during the flu season. The vaccine begins to protect you within a few days after you get the flu shot, but the vaccine is not fully effective until about 14 days after the shot.

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