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• #1 As norovirus cases surge, what you need to know to stay well – Early Bird

  https://early-bird.msudenver.edu/as-norovirus-cases-surge-what-you-need-to-know-to-stay-well/

  Norovirus is a highly contagious viral illness that causes acute gastroenteritis, which is inflammation of the stomach and intestines. It’s often called the “stomach flu” or “stomach bug,” but it is not related to influenza. Norovirus, on the other hand, leads to gastrointestinal symptoms like vomiting and diarrhea. […] The primary symptoms include nausea, vomiting, watery diarrhea and abdominal cramps. Secondary symptoms may include mild fever, muscle aches, fatigue and headache. […] Norovirus symptoms develop rapidly, typically within 12 to 48 hours after exposure. […] There is no specific treatment for norovirus, but symptoms can be managed with hydration, rest, diet, and medications. […] Seek medical care if you experience symptoms of severe dehydration like dizziness, dry mouth or decreased urination. Hospitalization for IV fluids may be required in severe cases. […] You’re still contagious for up to two to three days after symptoms resolve. It’s essential to continue practicing good hygiene even after you feel better to prevent spreading the virus to others.

• #1 What You Need to Know About Norovirus | ColumbiaDoctors

  https://www.columbiadoctors.org/news/what-you-need-know-about-norovirus

  Norovirus is a highly contagious virus that causes vomiting and diarrhea and cases are rising this winter. […] Norovirus is one of the most common causes of vomiting and diarrhea in adults and children. […] Norovirus is actually a group of RNA viruses with different strains that cause gastroenteritis. It can make you feel extremely ill, vomit, or have frequent diarrhea. […] Symptoms usually develop one to two days after exposure and commonly include: Nausea, Vomiting (non-bloody), Diarrhea (watery), Stomach pain, Dehydration (rare but possible), Fever, Headache, Body aches. […] Most people get better within one to three days. But they can still spread the virus for up to two weeks after symptoms resolve. […] In the United States, norovirus is the leading cause of vomiting and diarrhea from acute gastroenteritis in people of all ages. […] Young children, older adults, pregnant people, and people with other illnesses are the most susceptible.

• #1 Norovirus (Stomach Flu) Cases Are Surging: 3 Things to Know > News > Yale Medicine

  https://www.yalemedicine.org/news/norovirus-stomach-flu-cases-are-surging-3-things-to-know

  Norovirus infections cause acute gastroenteritisa stomach bug with cramps, diarrhea, vomiting, and other symptoms. […] The symptoms most commonly include abdominal cramps, diarrhea, nausea, and vomiting, but it can also cause body aches, chills, fever, headaches, and tiredness. […] A person who has been sick with norovirus sheds billions of virus particles in their stool or vomit. […] It only takes an exposure of as few as 10 particles for an individual to develop an infection. […] While people are most contagious when they are sick and a few days after their symptoms subside, they can still spread the virus for two weeks or more afterward. […] People develop symptoms within 12 to 48 hours of exposure to norovirus. […] Diarrhea and vomiting cause the body to lose fluids, so you’ll need to hydrate.

• #1 Norovirus infection – Symptoms & causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/norovirus/symptoms-causes/syc-20355296

  Norovirus infection can cause severe vomiting and diarrhea that start suddenly. […] Diarrhea, stomach pain and vomiting typically begin 12 to 48 hours after exposure. Norovirus infection symptoms usually last 1 to 3 days. […] Signs and symptoms of norovirus infection may start suddenly and include: Nausea, Vomiting, Stomach pain or cramps, Watery or loose diarrhea, Feeling ill, Low-grade fever, Muscle pain. […] Signs and symptoms usually begin 12 to 48 hours after your first exposure to a norovirus and last 1 to 3 days. […] Some people with norovirus infection may show no signs or symptoms. However, they’re still contagious and can spread the virus to others.

• #1 Norovirus: Symptoms, treatment, and preventionMedical News Today

  https://www.medicalnewstoday.com/articles/179107

  Norovirus, or the winter vomiting bug, can cause sickness, diarrhea, and gastroenteritis. It is highly contagious. […] The most common symptoms of norovirus include: nausea, vomiting, diarrhea, and stomach pain. It can also cause: fever, headache, and body aches. […] A person with norovirus can feel extremely ill, and experience vomiting and diarrhea many times throughout the day. This can result in a person becoming dehydrated. Symptoms of dehydration include: dizziness when standing up, dry mouth, dry throat, and decrease in urination. […] The CDC notes that signs and symptoms usually last 1–3 days and appear between 12 and 48 hours after the initial infection. In some cases, diarrhea may last longer than 3 days. […] The most common symptoms include vomiting, nausea, diarrhea, and stomach pain. It can also cause fever, headaches, and body aches.

• #1 Norovirus | NHS inform

  https://www.nhsinform.scot/illnesses-and-conditions/infections-and-poisoning/norovirus/

  Norovirus causes diarrhoea and vomiting and is one of the most common stomach bugs in the UK. It’s also called the ‘winter vomiting bug’ because it’s more common in winter, but you can catch it at any time of the year. […] You’re likely to have norovirus if you experience: suddenly feeling sick, projectile vomiting, watery diarrhoea. […] Some people also have a slight fever, headaches, painful stomach cramps and aching limbs. […] The symptoms appear 1 to 2 days after you become infected and typically last for up to 2 or 3 days.

• #1 Norovirus: Signs and Symptoms

  https://www.health.com/norovirus-symptoms-8410678

  Norovirus is a highly contagious viral infection that causes your intestines to become inflamed. As a result of the inflammation, you’ll likely experience symptoms like diarrhea, vomiting, and stomach pain. Generally, these symptoms develop about 12 hours to two days after exposure to the virus. In most cases, symptoms go away on their own within three days as your body fights off the infection. […] The most common symptom of norovirus is diarrhea. Researchers have found that diarrhea occurs in over 87% of all norovirus cases. Diarrhea causes loose, watery stools (poop). You may also feel a need to use the bathroom more often. Generally, this symptom will resolve on its own within three days. But it may take longer for people over 65 and toddlers or infants. […] When you become exposed to norovirus, you can expect several bouts of nausea and vomiting. This means you feel sick to your stomach and may have to throw up. People with this infection tend to experience these symptoms multiple times a day, usually for one to three days. In one study, researchers found about 25.5% of those exposed to norovirus experience these symptoms. Children, those older than 65, or people with autoimmune conditions may experience symptoms longer.

• #1 Norovirus

  https://prod.nmhealth.org/about/erd/ideb/noro/

  Norovirus infection causes gastrointestinal illness, which is an inflammation of the stomach and intestines associated with rapid onset of diarrhea and/or vomiting. […] Illness is characterized by acute onset of vomiting, watery, non-bloody diarrhea with abdominal cramps, and nausea. Body aches, fatigue, and headache are also commonly reported. Low-grade fever is present in about half of cases. Studies suggest that up to 30% of infections may be asymptomatic. Generally, medications are not needed or effective and most people recover within 1-3 days; however, the virus can be found in their stool for 2 weeks or more after their illness resolves. Very young children or older adults may have more serious illness with dehydration being the most common complication which may require intravenous replacement fluids.

• #1 Stomach Flu: Symptoms, Causes & Treatment

  https://my.clevelandclinic.org/health/diseases/12418-stomach-flu

  The most common stomach flu symptoms are nausea, vomiting and diarrhea. […] With stomach flu, gastrointestinal symptoms often come on suddenly. […] The most common stomach flu symptoms are: Diarrhea. Nausea and vomiting. Loss of appetite. Abdominal pain and cramping. […] For many people, stomach flu symptoms seem to come on suddenly and out of nowhere. You might throw up or have diarrhea many times on that first day. Symptoms occur one to two days after you were exposed to the virus. […] The stages of stomach flu infection are: Exposure. Incubation. Acute infection. Recovery. […] Stomach flu usually only lasts a few days, but it may last up to a week or two in severe cases. […] Yes, its very contagious. […] Youre most contagious during the acute phase of the infection (when you have symptoms) and for a few days after.

• #1 Norovirus (vomiting bug) – NHS

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

  Norovirus, also called the winter vomiting bug, is a stomach bug that causes vomiting and diarrhoea. It can be very unpleasant, but usually gets better in about 2 days. […] The main symptoms of norovirus usually start suddenly and may include: feeling sick, being sick (vomiting), diarrhoea. You may also have: a high temperature, a headache, tummy pain, body aches and pains. […] You’ll usually start to feel better in 2 to 3 days. […] Diarrhoea and vomiting can usually be treated at home. The most important thing is to have lots of fluids to avoid dehydration. […] Speak to a pharmacist if you or your child (aged 5 years or over) have norovirus and: you have signs of dehydration, such as dark, smelly pee or peeing less than usual, you’re an older person, have a weakened immune system, or have other health conditions that increase your risk of dehydration, you need to stop diarrhoea for a few hours. […] You or your child (aged 5 years or over) still have signs of dehydration after using oral rehydration sachets. […] You or your child have diarrhoea for more than 7 days or vomiting for more than 2 days.

• #1 Norovirus – Wikipedia

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

  Norovirus infection is characterized by nausea, vomiting, watery diarrhea, abdominal pain, and in some cases, loss of taste. A person usually develops symptoms of gastroenteritis 12 to 48 hours after being exposed to norovirus. General lethargy, weakness, muscle aches, headaches, and low-grade fevers may occur. The disease is usually self-limiting, and severe illness is rare. Although having norovirus can be unpleasant, it is not usually dangerous, and most who contract it make a full recovery within two to three days. […] When a person becomes infected with norovirus, the virus replicates within the small intestine. The principal symptom is acute gastroenteritis, characterized by nausea, forceful vomiting, watery diarrhea, and abdominal pain, that develops 12 to 48 hours after exposure and lasts for 24–72 hours. Sometimes there is loss of taste, general lethargy, weakness, muscle aches, headache, cough, and/or low-grade fever. The disease is usually self-limiting. […] Symptoms usually develop 12 to 48 hours after being exposed, and recovery typically occurs within one to three days. Complications are uncommon, but may include dehydration, especially in the young, the old, and those with other health problems.

• #1 CDC Data Shows Norovirus Is Surging—Here are 5 Symptoms You Really Shouldn’t Ignore | SELF

  https://www.self.com/story/norovirus-symptoms

  If theres one thing you dont want to endure, its the symptoms of norovirus, a brutal stomach bug that tends to cause relentless diarrhea and vomiting for roughly one to three hellish days. […] Again, norovirus symptoms are pretty intense. Chances are, youll quickly know somethings up once they hit. Heres what this stomach flu feels likeand when its time to see a doctor if youre cant-risk-leaving-my-bathroom sick. 1. Terrible stomach cramping or pain. Its easy to write off an upset stomach, but the abdominal cramping and pain typically caused by norovirus will be hard to ignore. Many people also experience uncomfortable nausea, per the CDC. 2. Diarrhea, vomiting, or both. Norovirus often causes persistent diarrhea and vomitingsometimes both at the same time, Rabia A. De Latour, MD, gastroenterologist and assistant professor of medicine at NYU Langone, tells SELF. Per the CDC, it isnt unusual to feel extremely ill and deal with diarrhea or vomiting multiple times a day with the stomach flu. (That said, norovirus shouldnt cause any blood in your poop.) 3. Body aches and other flu-like symptoms. Your GI tract may not be the only part of your body thats in pain: Norovirus can also cause muscle aches (similar to those caused by the flu), fatigue, and headaches. These are common symptoms of a lot of infectious illnesses; when your immune system jumps into action to fight the bug, your protective cells trigger inflammation, which can lead to soreness and make you feel completely wiped out. 4. Fever and chills. A low-grade fevermeaning your temperature is somewhere between 99.6 and 100.3 degrees Fahrenheitis a common symptom of norovirus, as are the chills. Like muscle aches, a fever can be a sign that your body is fighting an infection, and it can make you feel clammy or sweaty. 5. Severe dehydration. Because norovirus can set off seemingly nonstop diarrhea and vomiting, its essential to be aware of your fluid intake once symptoms hit, Dr. Cao says: One of the most frequent symptoms we see in patients is dehydration. This, in turn, can lead to muscle cramps, headaches, dizziness or lightheadedness, dark-colored urine, dry mouth, exhaustion, or feeling confused.

• #1 Centre for Health Protection – Norovirus Infection

  https://www.chp.gov.hk/en/healthtopics/content/24/33.html

  Symptoms include nausea, vomiting, diarrhoea, abdominal pain, low-grade fever and malaise. […] The symptoms are usually self-limiting and most people will get better within 1 – 3 days.

• #1 CDC Data Shows Norovirus Is Surging—Here are 5 Symptoms You Really Shouldn’t Ignore | SELF

  https://www.self.com/story/norovirus-symptoms

  If you have any combo of the symptoms above and they dont settle down after 48 hoursor you just feel really unwell and cant keep food or liquids downits time to seek medical help, Dr. De Latour says. Getting in touch with a primary care doctor is a good place to start, whether theyre a provider you see regularly or one at an urgent care center. You should also seek immediate helpeven before the two-day markif you notice any symptoms of severe dehydration, like a rapid pulse, confusion, fainting, or muscle twitching. At this stage, you may need to be quickly rehydrated through IV fluids, the CDC notes. Seeing blood in the toilet, either from diarrhea or vomiting, should also prompt a doctors visit, since this isnt normal with the stomach flu, Dr. Cao says. (Blood could be a sign of a different problem, like a parasitic or bacterial infection, hemorrhoids, or anal fissures, for example.) The sooner you know whats causing you to feel awful, the sooner youll be on a path to getting better.

• #1 what is norovirus? What are the norovirus symptoms 2025? What to know

  https://www.knoxnews.com/story/news/local/2025/01/15/what-is-norovirus-what-are-norovirus-symptoms-2025-how-to-avoid-getting-sick-this-winter/77694850007/

  Norovirus is an extremely contagious illness that commonly causes vomiting and diarrhea, according to the CDC. Norovirus causes acute gastroenteritis, an inflammation of the stomach or intestines. […] The following are symptoms of norovirus infection, according to the Minnesota Department of Health and the Cleveland Clinic: Vomiting, Diarrhea, Stomach cramping, Urinating less or having dark-colored pee, Dry mouth, Feeling weak, Dizziness. […] Symptoms of norovirus are likely to appear 12-48 hours after exposure. The CDC recommends staying home for two days after you feel the symptoms subside. […] Most people with norovirus illness recover in one to three days, according to the CDC.

• #1 About Norovirus | Norovirus | CDC

  https://www.cdc.gov/norovirus/about/index.html

  Norovirus is a very contagious virus that causes vomiting and diarrhea. […] Most common symptoms: Diarrhea, vomiting, nausea, stomach pain […] If you have norovirus illness, you can feel extremely ill, and vomit or have diarrhea many times a day. This can lead to dehydration (loss of body fluids), especially in young children, older adults, and people with other illnesses. Symptoms of dehydration include: Decreased urination, Dry mouth and throat, Feeling dizzy when standing up, Crying with few or no tears, Unusual sleepiness or fussiness. […] Most people with norovirus illness get better within 1 to 3 days.

• #1 Norovirus: What to do if you catch it and helping to stop the spread – UK Health Security AgencyGOV.UK

  https://ukhsa.blog.gov.uk/2022/11/17/norovirus-what-to-do-if-you-catch-it-and-helping-to-stop-the-spread/

  Norovirus, commonly known as the winter vomiting bug (although it can strike at any time of year), is a stomach bug that causes sickness and diarrhoea. […] Symptoms include sudden onset of nausea, projectile vomiting and diarrhoea but can also include a high temperature, abdominal pain and aching limbs. […] The incubation period of norovirus is 12 to 48 hours, which is the time between catching the virus and developing symptoms. […] Vomiting and diarrhoea causes your body to lose water and salts, which can lead to dehydration, so it is important to drink plenty of fluids to prevent this. […] Norovirus immunity is short lived and there is no cross-strain immunity, therefore it is possible to have multiple norovirus infections in a short period of time if you’re exposed to different strains.

• #1 Norovirus | Disease Outbreak Control Division

  https://health.hawaii.gov/docd/disease_listing/norovirus/

  Symptoms of norovirus illness usually begin about 24 to 48 hours after exposure to the virus, but they can appear as early as 12 hours after exposure. […] The symptoms of norovirus illness usually include nausea, vomiting, diarrhea, and stomach cramps. Some people may have a mild fever, chills, headache, muscle aches, and a general sense of tiredness. The illness often begins suddenly, and the infected person may feel very sick. The illness is usually short, with symptoms lasting only about 1 or 2 days.

• #1 Are Your Stomach Bug Symptoms the Norovirus?

  https://www.aarp.org/health/conditions-treatments/norovirus-stomach-bug-symptoms-prevention/

  Youre fine one minute, and the next, it hits you: stomach pain, nausea, vomiting and diarrhea. […] Each year, norovirus sickens about 20 million Americans and causes around 900 deaths, mostly among adults 65 and older. […] Common Symptoms of Norovirus: Diarrhea, Vomiting, Nausea, Stomach pain. […] If you start to feel dizzy or lightheaded or notice you havent urinated in a while, that could be a sign of severe dehydration, which requires medical attention. […] The good news is, most of the time norovirus leaves as quickly as it comes on; people start to feel better within one to three days.

• #1 Norovirus | Mass.gov

  https://www.mass.gov/info-details/norovirus

  Norovirus is a very contagious virus that causes acute gastroenteritis with vomiting and diarrhea. Gastroenteritis is inflammation of the stomach and intestines. […] Common symptoms of norovirus infection come on suddenly and include vomiting, diarrhea, nausea, and abdominal cramps. People with norovirus can also experience fever, headache, and muscle aches. Symptoms usually begin 12 to 48 hours after exposure to the virus and last about 1 to 3 days in most people, with no long-term effects. […] People with norovirus infection are most contagious when they have symptoms, especially vomiting, and during the first few days after feeling better. Studies have shown that you can still spread norovirus for two weeks or more after you feel better. Sometimes people infected with norovirus have no symptoms but can still pass the virus to others.

• #1 Norovirus Infection in Older Adults Epidemiology, Risk Factors, and Opportunities for Prevention and Control

  https://pmc.ncbi.nlm.nih.gov/articles/PMC6546097/

  Older adults form a high-risk group for severe symptoms and clinical outcomes. Norovirus outbreak investigations have reported a longer duration of diarrhea, from 3 days to 9 days, in older adults and even slower recovery from illness in patients greater than or equal to 85 years of age, with almost half of those affected still symptomatic after 4 days. Clinical symptoms other than diarrhea may also be prolonged in this age group; one study reported persistent headache, thirst, and vertigo as long as 19 days postonset of illness in 10 individuals 79 years old to 94 years old in an aged-care facility, although the diarrhea and vomiting had resolved by day 4 postonset. […] These age-related factors are also likely contributors to the high mortality rate in this age group from norovirus-associated illness. It is estimated that a vast majority (90%) of norovirus-associated deaths in the United States occur among persons greater than or equal to 65 years of age. In a study of norovirus outbreaks in nursing homes, all-cause mortality was higher in outbreak periods compared with nonoutbreak periods. When norovirus-associated deaths do occur, most infections are acquired in LTCFs and hospitals; a global review in developed countries found that immediate causes of death in these scenarios included sepsis, aspiration pneumonia, and cardiac complications.

• #1 Your Guide to Norovirus (the „Stomach Bug”) – Stony Brook Medicine Health News

  https://health.stonybrookmedicine.edu/your-guide-to-norovirus-the-stomach-bug/

  Norovirus, often called the stomach flu or stomach bug, is one of the most common causes of gastroenteritis, which describes inflammation of the stomach and intestines. This illness causes unpleasant symptoms like nausea, vomiting and diarrhea. […] Norovirus symptoms usually come on quickly, often within 12 to 48 hours after exposure. Common signs of norovirus include: Nausea, Vomiting, Diarrhea (often watery and frequent), Stomach cramps or pain, Low-grade fever or chills, Fatigue and body aches. Norovirus symptoms can range from mild to severe, but dehydration is one of the main concerns due to the rapid fluid loss caused by vomiting and diarrhea. Symptoms of dehydration include dry mouth, extreme thirst, dark urine and dizziness. […] For most people, norovirus symptoms last one to three days. In some cases, lingering fatigue or mild gastrointestinal discomfort can last a few more days as your body fully recovers.

• #1 How to avoid the highly contagious stomach flu | Portsmouth Hospital

  https://portsmouthhospital.com/blog/entry/how-to-avoid-the-highly-contagious-stomach-flu

  People usually develop symptoms one to two days after they’ve been exposed. Nausea, vomiting and diarrhea are the most predominant symptoms associated with this infection. Some people may also have a headache or feel generally achy. Norovirus is sometimes associated with a low-grade fever of around 100.4 to 101 degrees but not always. People with norovirus may also have some stomach cramping and belly pain. If you’re running to the bathroom several times a day, you could imagine that your gut is working really hard. […] Norovirus symptoms usually last for about 48 to 72 hours. Those with a cold or some other viral illnesses usually feel bad but then gradually start to feel better over time. People with norovirus, on the other hand, usually have a pretty rapid recovery. They tend to be really sick and then suddenly start feeling better. They might wake up in the morning and say, „Hey, okay. It’s gone. I feel better.”

• #1 Norovirus (for Parents) | Nemours KidsHealth

  https://kidshealth.org/en/parents/norovirus.html

  Norovirus is a virus that causes diarrhea and vomiting. It’s sometimes called the stomach flu or stomach bug, but norovirus (NOR-uh-vy-ris) isn’t related to the flu. About a day or two after contact with norovirus, a person may have symptoms such as: nausea and vomiting, watery diarrhea, belly pain. Some people might also have a fever, chills, headache, or muscle aches. Sometimes norovirus causes no symptoms, but infected people can still pass the virus to others. A child with a norovirus infection who has a lot of diarrhea and vomiting can get dehydrated and feel lightheaded or dizzy. Kids with other health problems may have more severe symptoms. Symptoms of norovirus infection usually last about 2–3 days. Call the doctor if your child: goes more than a few hours without drinking, has signs of dehydration, such as a dry mouth, few tears when crying, peeing less than 3 times a day, or no wet diaper in 4–6 hours, still has diarrhea or vomiting after a few days, develops a high fever, vomits blood, or has bloody diarrhea or severe belly pain.

• #1 Bugged by the winter surge of the stomach bug | VCU Healthic_closeGroup

  https://www.vcuhealth.org/news/bugged-by-the-winter-surge-of-the-stomach-bug/

  Norovirus is a highly contagious virus that causes vomiting and diarrhea. […] You will likely begin to experience symptoms 12 to 48 hours after being exposed to someone who is sick. These symptoms typically last one to three days. Some of the most common symptoms include diarrhea, vomiting, nausea, and stomach pain. People can also have a fever, headache, and body aches. Those sick with the stomach bug often vomit several times a day, which can lead to dehydration or loss of body fluids. […] You are the most contagious when you’re sick, especially when vomiting, and during the first few days when you start to feel better. According to the Centers for Disease Control and Prevention, some studies show that you can still spread norovirus for two weeks or more after you feel better.

• #1 Stomach Flu: Symptoms, Causes & Treatment

  https://my.clevelandclinic.org/health/diseases/12418-stomach-flu

  The most likely complication is dehydration. […] Stay alert for signs of dehydration, such as: Thirst. Lack of urine (pee) or dark-colored urine. Lack of poop or hard, dry poop. Weakness or malaise. Sunken eyes. Crying without tears. Dehydration headache. Dry lips and tongue. […] For most people, symptoms get better in a few days. […] Its best to say isolated until two days after your symptoms have stopped.

• #1 Norovirus: Symptoms, causes & effective treatment options | GoHealth Urgent Care

  https://www.gohealthuc.com/library/norovirus-symptoms-causes-effective-treatment-options

  Norovirus can cause severe dehydration, particularly in children, older adults, or people with underlying health concerns. Dehydration can lead to serious complications and may require IV fluid or other care. Signs of dehydration include: Decreased urination, Dark urine, Dry mouth, Dizziness, Headache, Not producing tears.

• #1 What Should I Do If My Child Has Norovirus? | Mount Sinai Today

  https://health.mountsinai.org/blog/what-should-i-do-if-my-child-has-norovirus/

  If your child has a stomach bug, it could be norovirus—a highly contagious stomach virus that causes diarrhea and vomiting. […] Norovirus is a common contagious virus that inflames the intestines, causing nausea, diarrhea, and throwing up. Sometimes it can also cause fever. […] Newborn babies and children who have underlying chronic illnesses such as kidney disease and diabetes are at higher risk for becoming dehydrated and severely ill because excessive fluid losses can affect their kidney and their liver function. […] Watch for symptoms of dehydration, such as decreased or less frequent urination and small volume- or very dark or strong-smelling urine. […] If you notice that your child seems very lethargic and listless, you should seek medical advice right away. […] Once the virus has passed and the vomiting and diarrhea have subsided, make sure they are well hydrated and rested. […] There are no over-the-counter anti-diarrheals or anti-nausea medicines that are recommended for children. […] It is important that everyone in your house washes their hands regularly with warm water, and avoid sharing food and drinking cups with anyone who is sick.

• #1 Norovirus: A Stomach Bug is Making the Rounds – CHP Berkshires

  https://chpberkshires.org/50052-2/

  Norovirus, a contagious stomach bug that can cause nausea, vomiting, and diarrhea, is making the rounds in our community and elsewhere. […] At CHP, we are seeing patients with classic symptoms, which can include stomach cramps, fatigue, body aches, and sometimes fever. Symptoms typically last for a few days. […] The virus is highly contagious, especially in the first few days of symptoms, and you can be contagious for several days or even weeks after you feel better. If you are exposed, it will take a day or two for your symptoms to appear. […] Severe dehydration may require hospitalization for intravenous fluids. If symptoms persist or worsen, it’s essential to contact your healthcare provider.

• #1 Norovirus Infection in Older Adults Epidemiology, Risk Factors, and Opportunities for Prevention and Control

  https://pmc.ncbi.nlm.nih.gov/articles/PMC6546097/

  After an incubation period of 12 hours to 48 hours, the classic symptoms of norovirus disease include sudden onset of vomiting, abdominal cramps, and watery diarrhea. Constitutional symptoms, including low-grade fever, generalized myalgias, malaise, headache, and chills, frequently accompany the gastroenteritis. Vomiting and diarrhea are usually present together, but either can be seen alone. Most patients experience a brief, self-limited infection with symptoms resolving within 2 days to 3 days. The clinical spectrum of illness is varied, however, and up to one-third of those infected are asymptomatic. On the other end of the spectrum, the most vulnerable include those with underlying medical conditions, the very young, the elderly, and the immunocompromised, who are at greater risk for severe symptoms and complications, such as acute renal failure leading to hemodialysis, cardiac complications including arrhythmias, acute graft organ rejection in transplant recipients, and death.

• #1 Norovirus Infection – Warde Medical Laboratory

  https://wardelab.com/warde-reports/norovirus-infection/

  Norovirus infection produces acute self-limiting gastroenteritis lasting 24–48 hours. Symptoms include nausea, vomiting, watery non-bloody diarrhea, abdominal pain, myalgia, headache, malaise, low grade fever or a combination of these symptoms. […] Diarrhea is more common than vomiting in children. Dehydration is the most common complication, especially among the young and elderly, and may require medical attention.

• #1

  https://www.healthychildren.org/English/health-issues/conditions/infections/Pages/norovirus-what-to-do-if-your-child-catches-this-highly-contagious-stomach-bug.aspx

  Norovirus is the leading cause of vomiting and diarrhea from acute gastroenteritis in the United States. The main symptoms of norovirus are nausea, vomiting and watery diarrhea. These are often seen with other symptoms that include belly pain and cramps, fever, headache, muscle pain, and feeling tired. […] In most cases, though, kids make a full recovery in 2 to 3 days (or a little longer for younger children). Ongoing vomiting and diarrhea can quickly lead to dehydration. Signs include dark-colored pee, dry mouth, weakness, dizziness and fewer wet diapers or trips to the bathroom. […] Your child is less likely to pass norovirus along to others when vomiting and diarrhea have been gone for at least 48 hours.

• #1 What to Know About Norovirus | School of Medicine

  https://medicine.tufts.edu/news-events/news/what-know-about-norovirus

  Even after the worst of the infection passes, you may still feel dehydrated or have persistent stomach issues from a lack of beneficial bacteria in your gut. Norovirus sort of decimates your microbiome, says St. Louis. It will take weeks to months to rebuild a healthy gut, so people may continue to have lingering symptoms like occasional diarrhea, cramping, nausea, and constipation until they’re able to get their microbiome back in order. […] Children under 12 months old or people with weakened immune systems are at a higher risk of more severe norovirus symptoms and may be more likely to develop chronic norovirus, when symptoms of norovirus last for weeks or even months.

• #1 Norovirus Symptoms and Treatment: What to Do If You Get Sick | BASS Medical Group

  https://www.bassmedicalgroup.com/blog-post/bloated-stomach-and-other-symptoms-of-norovirus

  You may feel fine one moment and suddenly feel very ill the next. Thats typical of norovirus. Most symptoms last 1 to 3 days. […] Main Symptoms Include: Nausea, Vomiting, Diarrhea, Abdominal cramps or bloating. […] Warning: Dehydration is the biggest concern, especially for infants, older adults, and those with chronic conditions. Watch for signs like dry mouth, reduced urination, dizziness, or dark urine. […] Most people recover from norovirus at home. However, you should schedule a visit with a BASS primary care provider if: Symptoms last more than 3 days, You cant keep fluids down, Vomit appears green/yellow (bile) or contains blood, You experience severe abdominal pain or a high fever. […] There is no specific antiviral medication for norovirus. Treatment focuses on managing symptoms and preventing dehydration. […] In severe cases, IV fluids may be necessary. Contact your provider if dehydration symptoms worsen. […] Norovirus symptoms can appear suddenlyrest, hydrate, and contact your PCP if symptoms dont improve in a few days.

• #1 Norovirus: What to Know | Student Health Center | RIT

  https://www.rit.edu/studenthealth/norovirus-what-know

  Symptoms may include nausea, vomiting, diarrhea, and stomach pain. […] Most people experience two or more of the following symptoms: nausea, vomiting, diarrhea, abdominal discomfort, headache, fever and muscle aches. Symptoms may last several hours to a couple of days with the average episode lasting about 24-48 hours. […] Prolonged bouts of vomiting and diarrhea can lead to dehydration and disruption in body chemistries. […] You have been vomiting for more than 2 days. […] You have diarrhea for more than 3 days or without gradual improvement over 5 days. […] You have abdominal pain (other than mild cramping). […] You are vomiting blood. […] You notice blood in your bowel movements. […] You experience signs of dehydration such as excessive thirst, dry mouth, dark, very little or no urine, severe weakness, dizziness or lightheadedness. […] You have a temperature of 101 or higher.

• #1 Norovirus (Stomach Flu) Cases Are Surging: 3 Things to Know > News > Yale Medicine

  https://www.yalemedicine.org/news/norovirus-stomach-flu-cases-are-surging-3-things-to-know

  Young children, older adults, and/or those who are immunocompromised, face a higher risk for complications than others. […] The biggest complication is dehydration, and anyone experiencing severe dehydrationwith symptoms including light-headedness, confusion, and passing outshould seek medical care right away. […] Most people get better within one to three days.

• #1 What to Know About Norovirus | School of Medicine

  https://medicine.tufts.edu/news-events/news/what-know-about-norovirus

  Norovirus symptoms appear very soon after infection, says St. Louis. People feel well one moment, and then the next moment, they feel extremely unwell, he says. You’ll know you probably have norovirus if your main symptoms are almost uncontrollable diarrhea and vomiting—virtually all infected people experience diarrhea, and about half have vomiting as well. […] Rarer norovirus symptoms may include a fever, chills, or muscle aches. In most healthy people, these symptoms leave almost as quickly as they arrived, and usually last for only about 12-36 hours. […] Dehydration is the most dangerous effect of norovirus, so replacing lost fluids is key. Symptoms of dehydration among people of all ages include dry mouth and lips, a decreased frequency of urination, fatigue, or dizziness. Cracked lips or skin that looks tight or pale are signs that dehydration may be severe.

• #1 Norovirus – NYC Health

  https://www.nyc.gov/site/doh/health/health-topics/norovirus.page

  Norovirus is a very contagious virus that causes stomach illness, including vomiting and diarrhea. This illness is also sometimes called gastroenteritis or the „stomach flu,” though norovirus is not related to the flu (influenza). […] Symptoms start one to two days after infection with the virus. The most common are vomiting and diarrhea. Other symptoms include: Nausea, Stomach cramps, Fever, Chills, Aches, Tiredness. […] There is no specific treatment for norovirus and most people get better on their own. You can take medicine to reduce diarrhea and vomiting. You should also drink plenty of fluids to prevent dehydration. If you get dry skin, dry mouth, or dry eyes, go to a doctor or hospital immediately.

• #1 How to Get Rid of Stomach Bug Symptoms

  https://pepto-bismol.com/en-us/symptoms/all-diarrhea-articles/diarrhea-from-stomach-bug-5-things-to-know

  Common symptoms include watery diarrhea, pain or cramping, nausea, vomiting, and sometimes fever, and typically last up to a week. […] The stomach bug will pass but there’s no need to suffer through it or simply control the symptoms. Aside from staying hydrated, the best thing you can do for the stomach bug is treat the diarrhea symptoms. […] Take Pepto Diarrhea at the first sign of diarrhea from the stomach bug so you can get to the source with its dual action formula and more importantly get relief from your diarrhea symptoms.

• #1

  https://www.bag.admin.ch/bag/en/home/krankheiten/krankheiten-im-ueberblick/norovirus.html

  Noroviruses cause diarrhoea. They are transmitted through the mouth or nose, causing copious vomiting and severe diarrhoea. […] The condition usually develops 12 to 48 hours after infection, and usually involves an abrupt onset marked by copious vomiting and diarrhoea and often accompanied by stomach and muscle pain and headaches. Some patients develop fever. Recovery takes two to three days. […] Treatment consists mainly of ensuring an adequate fluid intake.

• #2 Viral gastroenteritis (stomach flu) – Symptoms & causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/viral-gastroenteritis/symptoms-causes/syc-20378847

  Although it’s commonly called stomach flu, gastroenteritis isn’t the same as influenza. Gastroenteritis, on the other hand, attacks your intestines, causing signs and symptoms such as: […] Nausea, vomiting or both […] Depending on the cause, viral gastroenteritis symptoms may appear within 1-3 days after you’re infected and can range from mild to severe. Symptoms usually last just a day or two, but occasionally they may last up to 14 days. […] The main complication of viral gastroenteritis is dehydration — a severe loss of water and essential salts and minerals. If you’re healthy and drink enough to replace fluids you lose from vomiting and diarrhea, dehydration shouldn’t be a problem.

• #2 As norovirus cases surge, what you need to know to stay well – Early Bird

  https://early-bird.msudenver.edu/as-norovirus-cases-surge-what-you-need-to-know-to-stay-well/

  Norovirus is a highly contagious viral illness that causes acute gastroenteritis, which is inflammation of the stomach and intestines. It’s often called the “stomach flu” or “stomach bug,” but it is not related to influenza. Norovirus, on the other hand, leads to gastrointestinal symptoms like vomiting and diarrhea. […] The primary symptoms include nausea, vomiting, watery diarrhea and abdominal cramps. Secondary symptoms may include mild fever, muscle aches, fatigue and headache. […] Norovirus symptoms develop rapidly, typically within 12 to 48 hours after exposure. […] There is no specific treatment for norovirus, but symptoms can be managed with hydration, rest, diet, and medications. […] Seek medical care if you experience symptoms of severe dehydration like dizziness, dry mouth or decreased urination. Hospitalization for IV fluids may be required in severe cases. […] You’re still contagious for up to two to three days after symptoms resolve. It’s essential to continue practicing good hygiene even after you feel better to prevent spreading the virus to others.

• #2 Signs and symptoms of norovirus – Primary Care 24

  https://primarycare24.org.uk/news/2024/10/28/symptoms-of-norovirus/

  Norovirus is a highly contagious virus that causes gastroenteritis, an inflammation of the stomach and intestines. Often referred to as “a stomach bug” or “stomach flu,” norovirus can affect anyone at any time. However, it is particularly concerning in crowded environments like schools, nursing homes, and cruise ships. […] The symptoms of norovirus typically manifest 12 to 48 hours after exposure to the virus. Common symptoms include: Nausea and vomiting: This is often one of the first signs, leading to sudden episodes of vomiting. Diarrhoea: Watery diarrhoea is common, and it can be frequent. Stomach cramps: Cramping and abdominal pain are frequent complaints. Fever: A high temperature may accompany other symptoms, although fevers aren’t guaranteed with norovirus. Headaches and body aches: General discomfort and an aching body can make you feel generally unwell.

• #2 Norovirus: What Parents Need to Know | Connecticut Children’s

  https://www.connecticutchildrens.org/growing-healthy/norovirus-spiking-what-parents-need-know

  Norovirus is a highly contagious virus that comes on suddenly and causes vomiting, diarrhea, and stomach cramps. […] Symptoms of norovirus usually appear 12 to 48 hours after exposure and can include: Nausea and vomiting, sometimes violent or projectile. […] The worst of it usually lasts 1 to 3 days, with kids starting to feel better after day 3. But, norovirus can cause dehydration, which can be dangerous if left untreated. […] Dehydration is the biggest concern with norovirus, especially for young children. When kids lose fluids through vomiting and diarrhea, they may not drink enough to replace them. Signs of dehydration include: Dry mouth and cracked lips, No tears when crying, Dark yellow urine or going long periods without urinating, Sunken eyes, Lethargy or extreme tiredness. […] With norovirus, treatment focuses on managing symptoms and keeping your child hydrated.

• #2 Norovirus Infection in Older Adults Epidemiology, Risk Factors, and Opportunities for Prevention and Control

  https://pmc.ncbi.nlm.nih.gov/articles/PMC6546097/

  After an incubation period of 12 hours to 48 hours, the classic symptoms of norovirus disease include sudden onset of vomiting, abdominal cramps, and watery diarrhea. Constitutional symptoms, including low-grade fever, generalized myalgias, malaise, headache, and chills, frequently accompany the gastroenteritis. Vomiting and diarrhea are usually present together, but either can be seen alone. Most patients experience a brief, self-limited infection with symptoms resolving within 2 days to 3 days. The clinical spectrum of illness is varied, however, and up to one-third of those infected are asymptomatic. On the other end of the spectrum, the most vulnerable include those with underlying medical conditions, the very young, the elderly, and the immunocompromised, who are at greater risk for severe symptoms and complications, such as acute renal failure leading to hemodialysis, cardiac complications including arrhythmias, acute graft organ rejection in transplant recipients, and death.

• #2 CDC Data Shows Norovirus Is Surging—Here are 5 Symptoms You Really Shouldn’t Ignore | SELF

  https://www.self.com/story/norovirus-symptoms

  If theres one thing you dont want to endure, its the symptoms of norovirus, a brutal stomach bug that tends to cause relentless diarrhea and vomiting for roughly one to three hellish days. […] Again, norovirus symptoms are pretty intense. Chances are, youll quickly know somethings up once they hit. Heres what this stomach flu feels likeand when its time to see a doctor if youre cant-risk-leaving-my-bathroom sick. 1. Terrible stomach cramping or pain. Its easy to write off an upset stomach, but the abdominal cramping and pain typically caused by norovirus will be hard to ignore. Many people also experience uncomfortable nausea, per the CDC. 2. Diarrhea, vomiting, or both. Norovirus often causes persistent diarrhea and vomitingsometimes both at the same time, Rabia A. De Latour, MD, gastroenterologist and assistant professor of medicine at NYU Langone, tells SELF. Per the CDC, it isnt unusual to feel extremely ill and deal with diarrhea or vomiting multiple times a day with the stomach flu. (That said, norovirus shouldnt cause any blood in your poop.) 3. Body aches and other flu-like symptoms. Your GI tract may not be the only part of your body thats in pain: Norovirus can also cause muscle aches (similar to those caused by the flu), fatigue, and headaches. These are common symptoms of a lot of infectious illnesses; when your immune system jumps into action to fight the bug, your protective cells trigger inflammation, which can lead to soreness and make you feel completely wiped out. 4. Fever and chills. A low-grade fevermeaning your temperature is somewhere between 99.6 and 100.3 degrees Fahrenheitis a common symptom of norovirus, as are the chills. Like muscle aches, a fever can be a sign that your body is fighting an infection, and it can make you feel clammy or sweaty. 5. Severe dehydration. Because norovirus can set off seemingly nonstop diarrhea and vomiting, its essential to be aware of your fluid intake once symptoms hit, Dr. Cao says: One of the most frequent symptoms we see in patients is dehydration. This, in turn, can lead to muscle cramps, headaches, dizziness or lightheadedness, dark-colored urine, dry mouth, exhaustion, or feeling confused.

• #2 Norovirus

  https://prod.nmhealth.org/about/erd/ideb/noro/

  Norovirus infection causes gastrointestinal illness, which is an inflammation of the stomach and intestines associated with rapid onset of diarrhea and/or vomiting. […] Illness is characterized by acute onset of vomiting, watery, non-bloody diarrhea with abdominal cramps, and nausea. Body aches, fatigue, and headache are also commonly reported. Low-grade fever is present in about half of cases. Studies suggest that up to 30% of infections may be asymptomatic. Generally, medications are not needed or effective and most people recover within 1-3 days; however, the virus can be found in their stool for 2 weeks or more after their illness resolves. Very young children or older adults may have more serious illness with dehydration being the most common complication which may require intravenous replacement fluids.

• #2 What are the symptoms of norovirus? The stomach bug sickening N.J. – nj.com

  https://www.nj.com/healthfit/2025/01/what-are-the-symptoms-of-norovirus-the-stomach-bug-sickening-nj.html

  The most common symptoms of norovirus are diarrhea, vomiting, nausea, and stomach pain. The virus may also cause body aches, fever and headaches, according to the CDC. […] People with norovirus will feel extremely ill and can vomit or have diarrhea multiple times a day. This leads to severe dehydration, especially in young children and older adults. Symptoms of serious dehydration include: decreased urination, dry mouth and throat, dizziness, crying with few or no tears, and unusual sleepiness or fussiness. […] Norovirus can seem to come out of nowhere because symptoms develop very quickly, usually within 12 to 48 hours of being exposed, according to the CDC. […] Although it can be brutal, norovirus is usually mercifully short-lived. Most people with norovirus illness get better within one to three days, the CDC said.

• #2 Norovirus Symptoms and Treatment: What to Do If You Get Sick | BASS Medical Group

  https://www.bassmedicalgroup.com/blog-post/bloated-stomach-and-other-symptoms-of-norovirus

  You may feel fine one moment and suddenly feel very ill the next. Thats typical of norovirus. Most symptoms last 1 to 3 days. […] Main Symptoms Include: Nausea, Vomiting, Diarrhea, Abdominal cramps or bloating. […] Warning: Dehydration is the biggest concern, especially for infants, older adults, and those with chronic conditions. Watch for signs like dry mouth, reduced urination, dizziness, or dark urine. […] Most people recover from norovirus at home. However, you should schedule a visit with a BASS primary care provider if: Symptoms last more than 3 days, You cant keep fluids down, Vomit appears green/yellow (bile) or contains blood, You experience severe abdominal pain or a high fever. […] There is no specific antiviral medication for norovirus. Treatment focuses on managing symptoms and preventing dehydration. […] In severe cases, IV fluids may be necessary. Contact your provider if dehydration symptoms worsen. […] Norovirus symptoms can appear suddenlyrest, hydrate, and contact your PCP if symptoms dont improve in a few days.

• #2 Norovirus: Symptoms, treatment, and preventionMedical News Today

  https://www.medicalnewstoday.com/articles/179107

  Norovirus, or the winter vomiting bug, can cause sickness, diarrhea, and gastroenteritis. It is highly contagious. […] The most common symptoms of norovirus include: nausea, vomiting, diarrhea, and stomach pain. It can also cause: fever, headache, and body aches. […] A person with norovirus can feel extremely ill, and experience vomiting and diarrhea many times throughout the day. This can result in a person becoming dehydrated. Symptoms of dehydration include: dizziness when standing up, dry mouth, dry throat, and decrease in urination. […] The CDC notes that signs and symptoms usually last 1–3 days and appear between 12 and 48 hours after the initial infection. In some cases, diarrhea may last longer than 3 days. […] The most common symptoms include vomiting, nausea, diarrhea, and stomach pain. It can also cause fever, headaches, and body aches.

• #2 Bugged by the winter surge of the stomach bug | VCU Healthic_closeGroup

  https://www.vcuhealth.org/news/bugged-by-the-winter-surge-of-the-stomach-bug/

  Norovirus is a highly contagious virus that causes vomiting and diarrhea. […] You will likely begin to experience symptoms 12 to 48 hours after being exposed to someone who is sick. These symptoms typically last one to three days. Some of the most common symptoms include diarrhea, vomiting, nausea, and stomach pain. People can also have a fever, headache, and body aches. Those sick with the stomach bug often vomit several times a day, which can lead to dehydration or loss of body fluids. […] You are the most contagious when you’re sick, especially when vomiting, and during the first few days when you start to feel better. According to the Centers for Disease Control and Prevention, some studies show that you can still spread norovirus for two weeks or more after you feel better.

• #2 What’s causing my vomiting and diarrhea? | Public Health Madison & Dane County

  https://publichealthmdc.com/blog/2024-12-04/whats-causing-my-vomiting-and-diarrhea

  This time of year, it’s probably norovirus, which is the leading cause of vomiting and diarrhea, and food poisoning. This highly contagious virus is most common in the winter, causing diarrhea, vomiting, nausea, and stomach pain. You usually develop symptoms within 12 to 48 hours after exposure. It typically lasts 1 to 3 days and most people recover completely without any treatment. Some people are at higher risk of getting severely dehydrated or developing serious medical problems. Norovirus is in your poop and vomit even before you’re feeling sick, and it can stay in your poop for 2 weeks or more after you’re feeling better. You’re most contagious while you’re having symptoms and in the few days after you feel better.

• #2 Stomach Flu: Symptoms, Causes & Treatment

  https://my.clevelandclinic.org/health/diseases/12418-stomach-flu

  The most common stomach flu symptoms are nausea, vomiting and diarrhea. […] With stomach flu, gastrointestinal symptoms often come on suddenly. […] The most common stomach flu symptoms are: Diarrhea. Nausea and vomiting. Loss of appetite. Abdominal pain and cramping. […] For many people, stomach flu symptoms seem to come on suddenly and out of nowhere. You might throw up or have diarrhea many times on that first day. Symptoms occur one to two days after you were exposed to the virus. […] The stages of stomach flu infection are: Exposure. Incubation. Acute infection. Recovery. […] Stomach flu usually only lasts a few days, but it may last up to a week or two in severe cases. […] Yes, its very contagious. […] Youre most contagious during the acute phase of the infection (when you have symptoms) and for a few days after.

• #2 What Should I Do If My Child Has Norovirus? | Mount Sinai Today

  https://health.mountsinai.org/blog/what-should-i-do-if-my-child-has-norovirus/

  If your child has a stomach bug, it could be norovirus—a highly contagious stomach virus that causes diarrhea and vomiting. […] Norovirus is a common contagious virus that inflames the intestines, causing nausea, diarrhea, and throwing up. Sometimes it can also cause fever. […] Newborn babies and children who have underlying chronic illnesses such as kidney disease and diabetes are at higher risk for becoming dehydrated and severely ill because excessive fluid losses can affect their kidney and their liver function. […] Watch for symptoms of dehydration, such as decreased or less frequent urination and small volume- or very dark or strong-smelling urine. […] If you notice that your child seems very lethargic and listless, you should seek medical advice right away. […] Once the virus has passed and the vomiting and diarrhea have subsided, make sure they are well hydrated and rested. […] There are no over-the-counter anti-diarrheals or anti-nausea medicines that are recommended for children. […] It is important that everyone in your house washes their hands regularly with warm water, and avoid sharing food and drinking cups with anyone who is sick.

• #2 Norovirus (Stomach Flu) Cases Are Surging: 3 Things to Know > News > Yale Medicine

  https://www.yalemedicine.org/news/norovirus-stomach-flu-cases-are-surging-3-things-to-know

  Young children, older adults, and/or those who are immunocompromised, face a higher risk for complications than others. […] The biggest complication is dehydration, and anyone experiencing severe dehydrationwith symptoms including light-headedness, confusion, and passing outshould seek medical care right away. […] Most people get better within one to three days.

• #2 Norovirus Surges as Stomach Bug Spreads Widely

  https://www.everydayhealth.com/infectious-diseases/norovirus-spikes-in-us-as-stomach-bug-hits-hard/

  Norovirus symptoms are mainly gastrointestinal vomiting, nausea, and diarrhea. […] The illness is notable for vomiting, nausea, and diarrhea. The symptoms can come on suddenly and dramatically then generally abate after one to three days. […] Compared to many of the other viruses that cause gastrointestinal infections, norovirus causes prominent nausea and vomiting during the first day of illness even more prominent than the diarrhea. […] On average, norovirus causes 465,000 emergency department visits each year, mostly in young children, and 900 deaths annually, mainly among adults age 65 and older.

• #2 Norovirus (for Parents) | Nemours KidsHealth

  https://kidshealth.org/en/parents/norovirus.html

  Norovirus is a virus that causes diarrhea and vomiting. It’s sometimes called the stomach flu or stomach bug, but norovirus (NOR-uh-vy-ris) isn’t related to the flu. About a day or two after contact with norovirus, a person may have symptoms such as: nausea and vomiting, watery diarrhea, belly pain. Some people might also have a fever, chills, headache, or muscle aches. Sometimes norovirus causes no symptoms, but infected people can still pass the virus to others. A child with a norovirus infection who has a lot of diarrhea and vomiting can get dehydrated and feel lightheaded or dizzy. Kids with other health problems may have more severe symptoms. Symptoms of norovirus infection usually last about 2–3 days. Call the doctor if your child: goes more than a few hours without drinking, has signs of dehydration, such as a dry mouth, few tears when crying, peeing less than 3 times a day, or no wet diaper in 4–6 hours, still has diarrhea or vomiting after a few days, develops a high fever, vomits blood, or has bloody diarrhea or severe belly pain.

• #2 How to avoid the highly contagious stomach flu | Portsmouth Hospital

  https://portsmouthhospital.com/blog/entry/how-to-avoid-the-highly-contagious-stomach-flu

  Symptoms of dehydration include having a dry mouth or dry, shriveled skin. Little kids may seem to be crying but no tears are coming out. When babies or toddlers are having half the number of wet diapers than they normally have or fewer, we’ll be concerned about dehydration – especially if they’re also unusually sleepy or fussy. Older kids and adults can tell if they’re getting dehydrated by checking the color of their urine. If it’s a clear to a light straw yellow, that means you’re probably still well-hydrated. Having dark yellow or an orangey or amber-colored urine is a sign that you’re getting dehydrated. Other warning signs of dehydration include listlessness, dizziness or lightheadedness. […] People should see their doctor if there’s blood in their vomit or in their stool. That is a more serious warning sign. It’s also important to see your doctor if your symptoms last longer than one week or if you have a fever higher than 103 degrees. That’s a little bit more concerning and could suggest that something else might be going on. People who feel like they’re dehydrated or have so much abdominal pain that they can’t tolerate it definitely need to go see their doctor or go to the emergency room.

• #2 Norovirus: What Parents Need to Know | Connecticut Children’s

  https://www.connecticutchildrens.org/growing-healthy/norovirus-spiking-what-parents-need-know

  Most kids with norovirus can be cared for at home, but call your pediatrician if: Vomiting or diarrhea lasts more than 2 to 3 days. […] In rare cases, norovirus can lead to severe dehydration, which is a medical emergency. Go to the emergency room if your child has: Signs of severe dehydration, previously mentioned.

• #2 Norovirus (Stomach Flu) Cases Are Surging: 3 Things to Know > News > Yale Medicine

  https://www.yalemedicine.org/news/norovirus-stomach-flu-cases-are-surging-3-things-to-know

  Norovirus infections cause acute gastroenteritisa stomach bug with cramps, diarrhea, vomiting, and other symptoms. […] The symptoms most commonly include abdominal cramps, diarrhea, nausea, and vomiting, but it can also cause body aches, chills, fever, headaches, and tiredness. […] A person who has been sick with norovirus sheds billions of virus particles in their stool or vomit. […] It only takes an exposure of as few as 10 particles for an individual to develop an infection. […] While people are most contagious when they are sick and a few days after their symptoms subside, they can still spread the virus for two weeks or more afterward. […] People develop symptoms within 12 to 48 hours of exposure to norovirus. […] Diarrhea and vomiting cause the body to lose fluids, so you’ll need to hydrate.

• #2

  https://www.goodhousekeeping.com/health/a43275095/norovirus-2023-symptoms-signs-stomach-flu-bug/

  Also known as the stomach flu or bug, norovirus often triggers painful gastrointestinal symptoms as well as fever, aches and headaches within days of exposure. […] Symptoms may last up to 72 hours after they begin, but this timeline may vary and depends on how you choose to recover at home. […] Norovirus symptoms primarily include nausea, vomiting, diarrhea, stomach cramping, and sometimes fever, headache and body aches. […] Diarrhea and vomiting can be particularly concerning, as they may easily lead to dehydration, which can prompt a worsening condition due to things like dizziness and dry mouth. […] Norovirus symptoms usually appear 12 to 48 hours after exposure, but temporary upset stomach symptoms appear much faster within a couple of hours. […] However, symptoms from an upset stomach will subside within 24 hours at most, which isn’t the case for norovirus infections.

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