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• #1 Norovirus – StatPearls – NCBI BookshelfTwitterFacebookLinkedInGitHubNCBI Insights BlogTwitterFacebookYoutube

  https://www.ncbi.nlm.nih.gov/books/NBK513265/

  Noroviruses are nonenveloped, positive-sense, single-stranded RNA viruses from the Caliciviridae family and are the leading cause of acute gastrointestinal illness worldwide. […] Noroviruses have 10 known genogroups and 49 genotypes. The classification into genogroups and genotypes is based on amino acid diversity in VP1 and ORF1 proteins. Human infections are predominantly due to genogroups GI, GII, and GIV, with GII being the most common cause of gastroenteritis. […] The primary mode of transmission of norovirus is fecal-oral. Sources include ingesting contaminated water or food or direct transmission from a contaminated surface or infected person. […] Norovirus outbreaks are common in several different settings. Norovirus is known to cause gastroenteritis outbreaks in hospitals and other healthcare facilities.

• #2 Norovirus | The Unwelcome Invader: Causes, Symptoms

  https://idatb.com/norovirus/

  Noroviruses belong to the Caliciviridae family and are non-enveloped, single-stranded RNA viruses. At least six genogroups (GI to GVI) and numerous genetic clusters are within these groups. The most common genogroups responsible for human infections are GI and GII. […] Transmission of the Norovirus occurs through several routes, including: Direct person-to-person contact, Consumption of contaminated food or water, Contact with contaminated surfaces. […] The virus is highly contagious, with as few as 18 viral particles being enough to cause infection. Contamination can occur at any food handling and preparation stage, including the growing, harvesting, processing, and consumption phases. High-risk foods include shellfish, ready-to-eat foods, and fresh produce. […] Dr. Aron Hall, a Norovirus expert at the CDC, warns, “Noroviruses are remarkably resilient, able to survive freezing temperatures, heating up to 60 degrees Celsius (140 degrees Fahrenheit), and a wide range of pH levels.” This resilience makes Norovirus difficult to eliminate from contaminated food and prep surfaces in kitchens.

• #3 FAQ: Norwalk and Noroviruses

  https://eportal.mountsinai.ca/Microbiology/faq/norwalkfaq.shtml

  Norwalk virus is a common cause of vomiting and diarreal illness each winter and has often been referred to as „stomach flu” or „Winter Vomiting Disease”. Norwalk virus infections have been linked to outbreaks of vomiting and/or diarrhea in institutions such as child-care centres and long term care facilities as well as on cruise ships, camps, schools and households. […] The Norovirus group were first identified as the cause of a primary school outbreak of vomiting/diarrhea in Norwalk, Ohio during the early 1970’s. The group consists of related viruses that share similar symptoms and epidemiology. This virus group causes viral gastroenteritis predominately during the winter in temperate climates. […] Norwalk virus causes viral gastroenteritis, which is also known as acute nonbacterial gastroenteritis, food poisoning, food infection, stomach flu, and winter vomiting disease. A Norwalk virus infection results in illness 24 to 48 hours after exposure, and symptoms last from 12-48 hours. Illness is characterized by the abrupt onset of vomiting and/or non-bloody diarrhea; abdominal cramps are common.

• #4 How to Treat Norovirus: What to Know About the Stomach Flu – Primary Careicon-close

  https://healthmatters.nyp.org/dealing-with-a-stomach-bug-heres-what-you-need-to-know-about-norovirus/

  Norovirus is a group of viruses that cause gastroenteritis, or a stomach infection, that can lead to vomiting and diarrhea, among other symptoms. […] It’s the most common cause of stomach viruses in elderly populations and children, but anyone can get it. […] Norovirus is easily transmissible between person to person through viral particles, including saliva, vomit, or stool. […] Norovirus generally causes mild symptoms and lasts no more than 48 to 72 hours.

• #5 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. While it is sometimes called the “stomach flu” or “stomach bug,” norovirus is not related to the flu, which is caused by the influenza virus. […] Norovirus is the leading cause of acute gastroenteritis among people of all ages in the United States. It is possible to get sick at any time of the year, but illnesses are most common between November and April. […] 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.

• #6 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, the most common cause of viral stomach flu, is on the rise in the United States. Norovirus infections cause acute gastroenteritis—a stomach bug with cramps, diarrhea, vomiting, and other symptoms. […] No one can say for sure why norovirus is spiking even higher now. But there are many subtypes of the virus, and one possible reason could be that a strain called GII.17—which was once uncommon here, so fewer people have a strong immunity to it—has become increasingly dominant in the U.S. In recent months, seven out of 10 norovirus outbreaks in this country are linked to this strain. […] Norovirus classically increases in the winter months for many reasons, but the major one is that everyone is congregating indoors, especially with the holidays. Another factor is its high transmissibility. Very few norovirus particles are needed to infect a person.

• #7 Norovirus: Causes, symptoms and treatment | Live ScienceLive Science

  https://www.livescience.com/42944-what-is-norovirus.html

  Norovirus is a virus that causes vomiting and diarrhea in humans. It is the leading cause of gastrointestinal illness worldwide and across all age groups, according to a 2022 review in the journal Viruses. […] Norovirus is notorious for causing major outbreaks on cruise ships and in food outlets. However, the vast majority of infections occur in facilities where there is a high number of immunocompromised people, such as hospitals and hospices. Norovirus is not only highly contagious, but also difficult to treat, researchers noted. […] Dr. Lijuan Yuan, a professor of virology and immunology at Virginia Polytechnic Institute and State University in Blacksburg, Virginia, said that norovirus has a very high mutability rate. […] „There are at least 30 different genotypes of noroviruses that can infect humans, and new strains are emerging over time,” she told Live Science in an email. „Not all cases of norovirus infection are reported or diagnosed, so it’s difficult to know exactly how many different strains are currently in circulation,” she said.

• #8 Norovirus: symptoms, causes, prevention and treatments – HSE.ie

  https://www2.hse.ie/conditions/norovirus/

  Norovirus causes diarrhoea and vomiting. It is one of the most common stomach bugs in Ireland. […] Norovirus spreads very easily in public places such as hospitals, nursing homes and schools. […] You can catch it if small particles of vomit or poo from an infected person get into your mouth. […] You are most infectious from when your symptoms start until 48 hours after all your symptoms have disappeared. You may also be infectious for a short time before and after this. […] You can get norovirus more than once as the virus is always changing (mutating). Because of this, your body cannot build up long-term resistance to it.

• #9 Norovirus | Mass.gov

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

  Noroviruses are very contagious and can be found in the stool or vomit of infected people. People get sick by accidentally getting tiny particles of stool or vomit in their mouth from a person infected with norovirus. […] Anyone can get infected with norovirus. Children younger than 5 years old, older adults, and people with weakened immune systems are more likely to develop severe infections. […] There are many strains of noroviruses, and being infected does not provide long-lasting immunity. People can become infected with norovirus many times during their life. […] 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.

• #10 Norovirus: Causes, symptoms and treatment | Live ScienceLive Science

  https://www.livescience.com/42944-what-is-norovirus.html

  Norovirus is transmitted mostly through the fecal-oral route, meaning from feces of an infected individual to the mouth of a susceptible individual. […] Norovirus is a very stable pathogen. It can survive for long periods of time on surfaces and in water, even in extremely harsh environments, Yuan said. „In addition, there is a lack of long-term immunity after norovirus infection,” she said. […] The mechanism of norovirus infection is not fully understood, according to a 2012 review published in The Journal of Infectious Diseases. Norovirus is a relatively simple pathogen — each viral particle carries just nine protein-coding genes. […] Human norovirus binds to human cells via several specific receptors, such as histo-blood group antigens (HBGA), according to a 2019 review published in the journal Viruses.

• #11 About Norovirus | Norovirus | CDC

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

  Norovirus is the leading cause of vomiting and diarrhea, and foodborne illness in the United States. […] Norovirus is a very contagious virus that causes vomiting and diarrhea. […] Norovirus causes acute gastroenteritis, an inflammation of the stomach or intestines. […] You can get norovirus illness many times in your life because there are many different types of noroviruses. […] If eaten raw, oysters and other filter-feeding shellfish can contain viruses and bacteria that can cause illness or death. […] Norovirus spreads very easily and quickly in different ways. […] There is no specific medicine to treat people with norovirus illness. […] Antibiotic drugs will not help treat norovirus infections because they fight bacteria, not viruses.

• #12 Norovirus – StatPearls – NCBI BookshelfTwitterFacebookLinkedInGitHubNCBI Insights BlogTwitterFacebookYoutube

  https://www.ncbi.nlm.nih.gov/books/NBK513265/

  The average period from inoculation with the virus until clinical symptoms develop is 1.2 days, and norovirus symptoms usually resolve within 1 to 3 days. […] Host genetic factors appear to play a role in the susceptibility to norovirus, and specific IgG and IgA antibodies develop after infection. […] The management of norovirus infection involves treating the patient’s symptoms and mitigating the risk of an outbreak. […] Infection control is a priority in preventing norovirus outbreaks. While efforts at vaccine development are underway, hand hygiene, surface cleaning, and prevention of body fluid exposure are the mainstays of infection control. […] Norovirus vaccine development remains a priority for both the perceived public health and economic benefits. Developing a vaccine has been difficult because of the complex nature of norovirus, human immune responses, difficulty culturing the virus, and limited animal models for vaccine testing.

• #13 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. […] Norovirus is easily transmitted through contact with people with the infection and any surfaces or objects that have been contaminated with the virus. […] 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.

• #14 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

  A person who has been sick with norovirus sheds billions of virus particles in their stool or vomit. And it only takes an exposure of as few as 10 particles for an individual to develop an infection. […] Norovirus is very hardy in the environment and can survive on surfaces for a prolonged period of time—more than most pathogens. […] The virus can contaminate food and drink as well, and causes 58% of foodborne illnesses in the U.S., according to the CDC. People can be infected by eating raw shellfish, especially oysters, in which viral particles in contaminated water concentrate in the gut. […] Norovirus has a capsule around the virus that protects it against most routine disinfectants, such as alcohol-based, hand-sanitizing gels. But vigorous washing with plain soap and water for 20 seconds creates friction that better washes away the viral particles.

• #15 Norovirus | The Unwelcome Invader: Causes, Symptoms

  https://idatb.com/norovirus/

  Noroviruses belong to the Caliciviridae family and are non-enveloped, single-stranded RNA viruses. At least six genogroups (GI to GVI) and numerous genetic clusters are within these groups. The most common genogroups responsible for human infections are GI and GII. […] Transmission of the Norovirus occurs through several routes, including: Direct person-to-person contact, Consumption of contaminated food or water, Contact with contaminated surfaces. […] The virus is highly contagious, with as few as 18 viral particles being enough to cause infection. Contamination can occur at any food handling and preparation stage, including the growing, harvesting, processing, and consumption phases. High-risk foods include shellfish, ready-to-eat foods, and fresh produce. […] Dr. Aron Hall, a Norovirus expert at the CDC, warns, “Noroviruses are remarkably resilient, able to survive freezing temperatures, heating up to 60 degrees Celsius (140 degrees Fahrenheit), and a wide range of pH levels.” This resilience makes Norovirus difficult to eliminate from contaminated food and prep surfaces in kitchens.

• #16 What to know about norovirus, the ‘stomach bug’ that’s going around – WPR

  https://www.wpr.org/news/what-to-know-norovirus-stomach-bug-wisconsin

  Norovirus is a gastrointestinal virus that causes an infection within the GI tract. Common symptoms are vomiting and diarrhea, but people can also experience fever, abdominal pain and other symptoms. […] Norovirus spreads largely through contact with an infected person or a contaminated surface, or by ingesting something with virus particles in it. A person infected with norovirus sheds particles through fecal matter and vomit, and these particles can live for months on surfaces. […] Another reason norovirus is highly contagious is because just a few particles can lead to an infection. […] It takes about 10 virus particles, which in the virology world is literally next to nothing, Meller explained. […] While norovirus is not generally life-threatening, the CDC reports that it causes 900 deaths and 109,000 hospitalizations on average every year. The biggest risk is dehydration, which is more likely to affect young children, older adults and people who are immunocompromised. […] It has been difficult to develop a norovirus vaccine because, as with the common cold, there are so many rapidly changing variants in circulation that it is hard to identify which strains to protect against.

• #17 How Norovirus Spreads | Norovirus | CDC

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

  You can get norovirus by accidentally getting tiny particles of feces (poop) or vomit in your mouth from a person infected with norovirus. […] If you get norovirus illness, you can shed billions of norovirus particles that you cant see without a microscope. It only takes a few norovirus particles to make you and other people sick. […] Norovirus is the leading cause of vomiting and diarrhea, and foodborne illness in the United States.

• #18 Norovirus – StatPearls – NCBI BookshelfTwitterFacebookLinkedInGitHubNCBI Insights BlogTwitterFacebookYoutube

  https://www.ncbi.nlm.nih.gov/books/NBK513265/

  Noroviruses are nonenveloped, positive-sense, single-stranded RNA viruses from the Caliciviridae family and are the leading cause of acute gastrointestinal illness worldwide. […] Noroviruses have 10 known genogroups and 49 genotypes. The classification into genogroups and genotypes is based on amino acid diversity in VP1 and ORF1 proteins. Human infections are predominantly due to genogroups GI, GII, and GIV, with GII being the most common cause of gastroenteritis. […] The primary mode of transmission of norovirus is fecal-oral. Sources include ingesting contaminated water or food or direct transmission from a contaminated surface or infected person. […] Norovirus outbreaks are common in several different settings. Norovirus is known to cause gastroenteritis outbreaks in hospitals and other healthcare facilities.

• #19 Norovirus (vomiting bug) – NHS

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

  Norovirus is caused by a virus that spreads through poo. It can spread to others very easily. […] You can catch norovirus from: close contact with someone with norovirus, touching surfaces or objects that have the virus on them, then touching your mouth, eating food that’s been prepared or handled by someone with norovirus, drinking unclean water or infected food.

• #20 How Norovirus Spreads | Norovirus | CDC

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

  You can get norovirus by accidentally getting tiny particles of feces (poop) or vomit in your mouth from a person infected with norovirus. […] If you get norovirus illness, you can shed billions of norovirus particles that you cant see without a microscope. It only takes a few norovirus particles to make you and other people sick. […] Norovirus is the leading cause of vomiting and diarrhea, and foodborne illness in the United States.

• #21 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. Noroviruses are highly contagious. They commonly spread through food or water that is contaminated during preparation or through contaminated surfaces. Noroviruses can also spread through close contact with a person who has norovirus infection. […] Noroviruses are highly contagious. That means the norovirus infection can easily spread to others. The virus is shed in stool and vomit. You can spread the virus from the time you first have symptoms of illness until several days after you recover. Noroviruses can stay on surfaces and objects for days or weeks. […] You can get norovirus infection by: Eating contaminated food, Drinking contaminated water, Touching your hand to your mouth after your hand has been in contact with a contaminated surface or object, Being in close contact with a person who has norovirus infection. […] Noroviruses are difficult to kill because they can withstand hot and cold temperatures and many disinfectants.

• #22 Norovirus Fact Sheet – MN Dept. of HealthMinnesota Department of HealthMinnesota Department of healthprintsearchsharefacebookinstagramlinkedintwitteryoutube

  https://www.health.state.mn.us/diseases/norovirus/noro.html

  Noroviruses are a group of viruses (previously known as Norwalk-like viruses) that can cause gastroenteritis, an inflammation of the stomach and intestines. Norovirus is the leading cause of foodborne illness outbreaks in Minnesota. […] Noroviruses are very contagious. They are found in the stool (feces) or vomit of infected people. From there, noroviruses are transferred to food, water, or surfaces by the hands of infected people who have not washed adequately after using the bathroom. […] People become infected with norovirus by: Eating food or drinking liquids contaminated by an infected person. Eating uncooked shellfish that has been harvested from contaminated waters. Touching contaminated surfaces or objects and then touching their mouth or eating without washing their hands first.

• #23 Causes and Symptoms of Norovirus Infection – MN Dept. of HealthMinnesota Department of HealthMinnesota Department of healthprintsearchsharefacebookinstagramlinkedintwitteryoutube

  https://www.health.state.mn.us/diseases/norovirus/basics.html

  Noroviruses are members of a group of viruses called caliciviruses, known previously as “Norwalk-like viruses.” This infection is often mistakenly referred to as the “stomach flu,” but noroviruses are not related to the flu (influenza), which is a respiratory illness caused by influenza virus. Norovirus infection causes gastroenteritis, which is an inflammation of the stomach and the small and large intestines. Norovirus is by far the leading cause of foodborne illness outbreaks in Minnesota and the rest of the U.S. […] Norovirus is not a “new” virus, but interest in it is growing as more is learned about how frequently noroviruses cause illness in people. […] Noroviruses are found in the stool or vomit of infected people. People can become infected with the virus in several ways, including: eating food or drinking liquids that are contaminated with norovirus by foodhandlers who have not washed their hands adequately, touching surfaces or objects contaminated with norovirus, and then placing their hand in their mouth or eating before washing their hands, having direct contact with another person who is infected and showing symptoms (for example, when caring for someone with illness, or sharing foods or eating utensils with someone who is ill), swimming in or drinking water contaminated by infected persons.

• #24

  https://www.cbsnews.com/news/norovirus-cases-surging-parts-of-us-cdc-data/

  Cases of norovirus, a wretched and highly contagious stomach bug, are surging in parts of the United States this winter, according to government data. […] Norovirus virus is a „highly infectious virus causing diarrhea, abdominal pain and vomiting,” Gounder said. […] Most norovirus outbreaks occur when people who are already infected spread the virus to others by direct means, such as through sharing food or eating utensils. Outbreaks can also be spread through food, water or contaminated surfaces. […] Norovirus is the leading cause of foodborne illness in the United States, responsible for 58% of such infections acquired in the country each year, according to the CDC. […] Norovirus infections are caused by a group of viruses that spread easily, with as few as 10 viral particles having the ability to make someone sick, health experts say.

• #25 Causes and Symptoms of Norovirus Infection – MN Dept. of HealthMinnesota Department of HealthMinnesota Department of healthprintsearchsharefacebookinstagramlinkedintwitteryoutube

  https://www.health.state.mn.us/diseases/norovirus/basics.html

  Noroviruses are members of a group of viruses called caliciviruses, known previously as “Norwalk-like viruses.” This infection is often mistakenly referred to as the “stomach flu,” but noroviruses are not related to the flu (influenza), which is a respiratory illness caused by influenza virus. Norovirus infection causes gastroenteritis, which is an inflammation of the stomach and the small and large intestines. Norovirus is by far the leading cause of foodborne illness outbreaks in Minnesota and the rest of the U.S. […] Norovirus is not a “new” virus, but interest in it is growing as more is learned about how frequently noroviruses cause illness in people. […] Noroviruses are found in the stool or vomit of infected people. People can become infected with the virus in several ways, including: eating food or drinking liquids that are contaminated with norovirus by foodhandlers who have not washed their hands adequately, touching surfaces or objects contaminated with norovirus, and then placing their hand in their mouth or eating before washing their hands, having direct contact with another person who is infected and showing symptoms (for example, when caring for someone with illness, or sharing foods or eating utensils with someone who is ill), swimming in or drinking water contaminated by infected persons.

• #26 About Norovirus | Norovirus | CDC

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

  Norovirus is the leading cause of vomiting and diarrhea, and foodborne illness in the United States. […] Norovirus is a very contagious virus that causes vomiting and diarrhea. […] Norovirus causes acute gastroenteritis, an inflammation of the stomach or intestines. […] You can get norovirus illness many times in your life because there are many different types of noroviruses. […] If eaten raw, oysters and other filter-feeding shellfish can contain viruses and bacteria that can cause illness or death. […] Norovirus spreads very easily and quickly in different ways. […] There is no specific medicine to treat people with norovirus illness. […] Antibiotic drugs will not help treat norovirus infections because they fight bacteria, not viruses.

• #27 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

  A person who has been sick with norovirus sheds billions of virus particles in their stool or vomit. And it only takes an exposure of as few as 10 particles for an individual to develop an infection. […] Norovirus is very hardy in the environment and can survive on surfaces for a prolonged period of time—more than most pathogens. […] The virus can contaminate food and drink as well, and causes 58% of foodborne illnesses in the U.S., according to the CDC. People can be infected by eating raw shellfish, especially oysters, in which viral particles in contaminated water concentrate in the gut. […] Norovirus has a capsule around the virus that protects it against most routine disinfectants, such as alcohol-based, hand-sanitizing gels. But vigorous washing with plain soap and water for 20 seconds creates friction that better washes away the viral particles.

• #28 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. […] Norovirus is a member of the Caliciviridae family of viruses. These viruses are responsible for about 90% of viral gastroenteritis outbreaks and close to 50% of cases across the world. […] According to the Centers for Disease Control and Prevention (CDC), norovirus causes gastroenteritis in 19–21 million people per year in the United States. The virus is also responsible for 109,000 annual hospitalizations and 900 deaths in the U.S. every year. […] The Department of Health and Human Services suggest that the following are the most common causes of human norovirus infections: contaminated foods, shellfish, ready-to-eat foods, such as salads, ice, cookies, fruit, and sandwiches, that a worker with a norovirus infection has handled, any food that contains particles of the feces or vomit of a person with norovirus.

• #29 Norovirus – Disease Surveillance Epidemiology Program – MeCDC; DHHS Maine

  https://www.maine.gov/dhhs/norovirus

  Norovirus is a very contagious virus that causes vomiting and diarrhea. Norovirus causes what is known as the „stomach flu.” People with norovirus can shed billions of norovirus particles, and it only takes a few virus particles to make others sick. This virus can spread rapidly through daycares, long term care facilities, and other congregate facilities. You can get norovirus from: […] Norovirus spreads through contaminated food. Norovirus can easily contaminate food because it only takes a very small amount of virus particles to make you sick. Food can get contaminated with norovirus in many ways: […] Norovirus spreads through contaminated water. Recreational or drinking water can get contaminated with norovirus and make you sick or contaminate your food. […] Norovirus spreads through sick people and contaminated surfaces. Surfaces can get contaminated with norovirus in many ways, including when:

• #30 How to Treat Norovirus: What to Know About the Stomach Flu – Primary Careicon-close

  https://healthmatters.nyp.org/dealing-with-a-stomach-bug-heres-what-you-need-to-know-about-norovirus/

  Norovirus is a group of viruses that cause gastroenteritis, or a stomach infection, that can lead to vomiting and diarrhea, among other symptoms. […] It’s the most common cause of stomach viruses in elderly populations and children, but anyone can get it. […] Norovirus is easily transmissible between person to person through viral particles, including saliva, vomit, or stool. […] Norovirus generally causes mild symptoms and lasts no more than 48 to 72 hours.

• #31 What is Norovirus? | Poison Control

  https://www.poison.org/articles/what-is-norovirus

  Norovirus is a contagious illness that causes vomiting and diarrhea in both adults and children. […] Norovirus (formerly known as Norwalk-like virus) is a highly contagious virus that is a common cause of gastroenteritis (stomach bug or stomach flu). […] Noroviruses can cause food poisoning. […] Norovirus can be spread through foods that are prepared, handled, or served by infected individuals. […] Norovirus is very contagious, and exposure to as few as 18 norovirus particles is enough to cause infection. […] Norovirus can be transmitted through food or water contaminated with germs from an infected person. […] People infected with norovirus are contagious both when they are symptomatic and for the first few days after symptoms have resolved. […] However, airborne transmission of viral particles has been reported.

• #32 What parents need to know about norovirus (the stomach bug) – Le Bonheur Children’s Hospital

  https://www.lebonheur.org/blogs/practical-parenting/what-parents-need-to-know-about-norovirus-the-stomach-bug

  Norovirus is the leading cause of vomiting and diarrhea among people of all ages in the United States. […] Norovirus infections happen when people accidentally get tiny particles of feces (poop) or vomit from an infected person in their mouths. […] People can also eat food or drink liquids that are contaminated with norovirus (then, its known as food poisoning), and even by breathing in the virus if theyre close enough to an infected person who vomits.

• #33 Norovirus – NFID

  https://www.nfid.org/infectious-disease/norovirus/

  Norovirus is a common and highly contagious virus that causes inflammation in the stomach and intestines, a condition known as gastroenteritis. You can get norovirus from an infected person, contaminated food or water, or by touching contaminated surfaces. […] Commonly referred to as food poisoning or a stomach bug, noroviruses are the most common cause of gastroenteritis in the US. […] Norovirus outbreaks have been reported in many settings, including healthcare facilities, restaurants and catered events, schools, and childcare centers. […] Anyone can be infected and get sick with norovirus. You can get norovirus illness more than once during your lifetime. […] There are no specific medicines to treat people with norovirus. Antibiotics do not help because they fight bacteria, not viruses.

• #34 Norovirus | Mass.gov

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

  Noroviruses are very contagious and can be found in the stool or vomit of infected people. People get sick by accidentally getting tiny particles of stool or vomit in their mouth from a person infected with norovirus. […] Anyone can get infected with norovirus. Children younger than 5 years old, older adults, and people with weakened immune systems are more likely to develop severe infections. […] There are many strains of noroviruses, and being infected does not provide long-lasting immunity. People can become infected with norovirus many times during their life. […] 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.

• #35 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

  There is no medication that specifically treats norovirus—antibiotics treat bacterial diseases, such as bacterial pneumonia, and don’t help with viruses. […] Young children, older adults, and/or those who are immunocompromised face a higher risk for complications than others. Each year, there are 900 norovirus-related deaths, mostly among adults ages 65 years and older. The biggest complication is dehydration.

• #36 Norovirus | Mass.gov

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

  Noroviruses are very contagious and can be found in the stool or vomit of infected people. People get sick by accidentally getting tiny particles of stool or vomit in their mouth from a person infected with norovirus. […] Anyone can get infected with norovirus. Children younger than 5 years old, older adults, and people with weakened immune systems are more likely to develop severe infections. […] There are many strains of noroviruses, and being infected does not provide long-lasting immunity. People can become infected with norovirus many times during their life. […] 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.

• #37 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. The disease is spread when particles from an infected person’s feces or vomit spreads to others, typically in bathrooms, but also by eating or drinking contaminated foods and beverages; using contaminated utensils; touching contaminated surfaces; or having any direct contact with someone who is infected. […] Norovirus can infect an entire family at the same time, since even simple contact with others can lead to infection. […] 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. […] Testing is available. However, norovirus is similar to other types of stomach infections, such as rotavirus, and symptom management is the same, so testing isn’t useful.

• #38 Norovirus – NFID

  https://www.nfid.org/infectious-disease/norovirus/

  Norovirus is a common and highly contagious virus that causes inflammation in the stomach and intestines, a condition known as gastroenteritis. You can get norovirus from an infected person, contaminated food or water, or by touching contaminated surfaces. […] Commonly referred to as food poisoning or a stomach bug, noroviruses are the most common cause of gastroenteritis in the US. […] Norovirus outbreaks have been reported in many settings, including healthcare facilities, restaurants and catered events, schools, and childcare centers. […] Anyone can be infected and get sick with norovirus. You can get norovirus illness more than once during your lifetime. […] There are no specific medicines to treat people with norovirus. Antibiotics do not help because they fight bacteria, not viruses.

• #39 Common Norovirus Symptoms & Prevention

  https://www.theemergencycenter.com/common-norovirus-symptoms-and-prevention/

  Commonly referred to as the winter “Vomiting Bug”, Norovirus is a term given to a group of stomach viruses that cause inflammation in the stomach and intestines. […] People become infected with Norovirus primarily through the consumption of contaminated food or beverages. […] Noroviruses thrive in closed, densely populated areas such as restaurants, buildings, and even emergency rooms. […] The virus is remarkably resilient, able to survive both harshly cold and hot temperatures. […] Norovirus can also spread through the air, especially when vomiting or fecal material is involved. […] Individuals infected with Norovirus typically endure around three difficult days of vomiting, stomach pain, and diarrhea. […] The virus is challenging to contain as it becomes contagious even before symptoms manifest. […] While Norovirus is not necessarily life-threatening, it is an unpleasant illness. […] The best way to contain the virus is by taking preventative methods, and by staying home when infected with the virus to avoid infecting others.

• #40 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. While it is sometimes called the “stomach flu” or “stomach bug,” norovirus is not related to the flu, which is caused by the influenza virus. […] Norovirus is the leading cause of acute gastroenteritis among people of all ages in the United States. It is possible to get sick at any time of the year, but illnesses are most common between November and April. […] 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.

• #41 Norovirus – Wikipedia

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

  Norovirus, also known as Norwalk virus and sometimes referred to as the winter vomiting disease, is the most common cause of gastroenteritis. Infection is characterized by non-bloody diarrhea, vomiting, and stomach pain. […] The virus is usually spread by the fecal–oral route. This may be through contaminated food or water or person-to-person contact. It may also spread via contaminated surfaces or through air from the vomit of an infected person. Risk factors include unsanitary food preparation and sharing close quarters. […] Causes: Norovirus. […] Norovirus results in about 685 million cases of disease and 200,000 deaths globally a year. It is common both in the developed and developing world. […] Norovirus infections occur more commonly during winter months. It often occurs in outbreaks, especially among those living in close quarters. In the United States, it is the cause of about half of all foodborne disease outbreaks.

• #42 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, the most common cause of viral stomach flu, is on the rise in the United States. Norovirus infections cause acute gastroenteritis—a stomach bug with cramps, diarrhea, vomiting, and other symptoms. […] No one can say for sure why norovirus is spiking even higher now. But there are many subtypes of the virus, and one possible reason could be that a strain called GII.17—which was once uncommon here, so fewer people have a strong immunity to it—has become increasingly dominant in the U.S. In recent months, seven out of 10 norovirus outbreaks in this country are linked to this strain. […] Norovirus classically increases in the winter months for many reasons, but the major one is that everyone is congregating indoors, especially with the holidays. Another factor is its high transmissibility. Very few norovirus particles are needed to infect a person.

• #43 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. Noroviruses are highly contagious. They commonly spread through food or water that is contaminated during preparation or through contaminated surfaces. Noroviruses can also spread through close contact with a person who has norovirus infection. […] Noroviruses are highly contagious. That means the norovirus infection can easily spread to others. The virus is shed in stool and vomit. You can spread the virus from the time you first have symptoms of illness until several days after you recover. Noroviruses can stay on surfaces and objects for days or weeks. […] You can get norovirus infection by: Eating contaminated food, Drinking contaminated water, Touching your hand to your mouth after your hand has been in contact with a contaminated surface or object, Being in close contact with a person who has norovirus infection. […] Noroviruses are difficult to kill because they can withstand hot and cold temperatures and many disinfectants.

• #44 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. Noroviruses are highly contagious. They commonly spread through food or water that is contaminated during preparation or through contaminated surfaces. Noroviruses can also spread through close contact with a person who has norovirus infection. […] Noroviruses are highly contagious. That means the norovirus infection can easily spread to others. The virus is shed in stool and vomit. You can spread the virus from the time you first have symptoms of illness until several days after you recover. Noroviruses can stay on surfaces and objects for days or weeks. […] You can get norovirus infection by: Eating contaminated food, Drinking contaminated water, Touching your hand to your mouth after your hand has been in contact with a contaminated surface or object, Being in close contact with a person who has norovirus infection. […] Noroviruses are difficult to kill because they can withstand hot and cold temperatures and many disinfectants.

• #45 Symptoms & Causes of Viral Gastroenteritis (“Stomach Flu”) – NIDDK

  https://www.niddk.nih.gov/health-information/digestive-diseases/viral-gastroenteritis/symptoms-causes

  Norovirus is the most common cause of viral gastroenteritis. Symptoms usually begin 12 to 48 hours after you come into contact with the virus and last 1 to 3 days. […] Norovirus causes infections in people of all ages. […] Although some people call viral gastroenteritis stomach flu, influenza (flu) viruses do not cause viral gastroenteritis. […] No. While viruses cause viral gastroenteritis, bacteria, parasites, and chemicals may cause other kinds of gastroenteritis. […] Viral gastroenteritis spreads from person to person through contact with an infected person’s stool or vomit. […] Norovirus is especially contagious, meaning that it spreads easily from person to person. Norovirus can live for months on surfaces such as countertops and changing tables.

• #46 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

  A person who has been sick with norovirus sheds billions of virus particles in their stool or vomit. And it only takes an exposure of as few as 10 particles for an individual to develop an infection. […] Norovirus is very hardy in the environment and can survive on surfaces for a prolonged period of time—more than most pathogens. […] The virus can contaminate food and drink as well, and causes 58% of foodborne illnesses in the U.S., according to the CDC. People can be infected by eating raw shellfish, especially oysters, in which viral particles in contaminated water concentrate in the gut. […] Norovirus has a capsule around the virus that protects it against most routine disinfectants, such as alcohol-based, hand-sanitizing gels. But vigorous washing with plain soap and water for 20 seconds creates friction that better washes away the viral particles.

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

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

  According to the CDC, about 70% of foodborne norovirus infection outbreaks occur due to the direct contamination of food by a handler with norovirus immediately before its consumption. […] The best way to prevent the spread of foodborne noroviruses is to practice proper food handling. Good hand hygiene and food cleaning are important for preventing the transmission of norovirus. […] Noroviruses can survive freezing temperatures, as well as those as high as 140°F or 60°C. Some people may even develop an infection after eating steamed shellfish. The virus can also stay on the countertops and serving utensils for 2 weeks and is resistant to many hand sanitizers and disinfectants.

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

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

  According to the CDC, about 70% of foodborne norovirus infection outbreaks occur due to the direct contamination of food by a handler with norovirus immediately before its consumption. […] The best way to prevent the spread of foodborne noroviruses is to practice proper food handling. Good hand hygiene and food cleaning are important for preventing the transmission of norovirus. […] Noroviruses can survive freezing temperatures, as well as those as high as 140°F or 60°C. Some people may even develop an infection after eating steamed shellfish. The virus can also stay on the countertops and serving utensils for 2 weeks and is resistant to many hand sanitizers and disinfectants.

• #49 Understanding Norovirus: Symptoms and Treatment | Mount Nittany Health

  https://mountnittany.org/news-stories/health-and-wellness/understanding-norovirus-symptoms-prevention-and-treatment/

  Norovirus is the leading cause of vomiting, diarrhea, and foodborne illness in the United States, Dr. Jared Maurer of Mount Nittany Health explained. […] The influenza virus causes the flu, and norovirus causes acute gastroenteritis, an inflammation of the stomach or intestines. […] Understanding how norovirus spreads helps prevent infection. You can find norovirus in your vomit or feces (poop) even before you start feeling sick, Dr. Maurer explained. The virus can also stay in your poop for 2 weeks or more after you feel better, and you can still spread norovirus during that time. […] Norovirus is a very resistant virus. Again, hand sanitizer can be used in addition to hand washing, but it is not a substitute for handwashing, which is best, Dr. Maurer emphasized. Noroviruses are also relatively resistant to heat and can survive temperatures as high as 145F.

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

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

  According to the CDC, about 70% of foodborne norovirus infection outbreaks occur due to the direct contamination of food by a handler with norovirus immediately before its consumption. […] The best way to prevent the spread of foodborne noroviruses is to practice proper food handling. Good hand hygiene and food cleaning are important for preventing the transmission of norovirus. […] Noroviruses can survive freezing temperatures, as well as those as high as 140°F or 60°C. Some people may even develop an infection after eating steamed shellfish. The virus can also stay on the countertops and serving utensils for 2 weeks and is resistant to many hand sanitizers and disinfectants.

• #51 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

  A person who has been sick with norovirus sheds billions of virus particles in their stool or vomit. And it only takes an exposure of as few as 10 particles for an individual to develop an infection. […] Norovirus is very hardy in the environment and can survive on surfaces for a prolonged period of time—more than most pathogens. […] The virus can contaminate food and drink as well, and causes 58% of foodborne illnesses in the U.S., according to the CDC. People can be infected by eating raw shellfish, especially oysters, in which viral particles in contaminated water concentrate in the gut. […] Norovirus has a capsule around the virus that protects it against most routine disinfectants, such as alcohol-based, hand-sanitizing gels. But vigorous washing with plain soap and water for 20 seconds creates friction that better washes away the viral particles.

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

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

  According to the CDC, about 70% of foodborne norovirus infection outbreaks occur due to the direct contamination of food by a handler with norovirus immediately before its consumption. […] The best way to prevent the spread of foodborne noroviruses is to practice proper food handling. Good hand hygiene and food cleaning are important for preventing the transmission of norovirus. […] Noroviruses can survive freezing temperatures, as well as those as high as 140°F or 60°C. Some people may even develop an infection after eating steamed shellfish. The virus can also stay on the countertops and serving utensils for 2 weeks and is resistant to many hand sanitizers and disinfectants.

• #53 What is Norovirus? | Poison Control

  https://www.poison.org/articles/what-is-norovirus

  Common symptoms of norovirus infection include nausea, vomiting, diarrhea, stomach aches, and headache. […] There is no cure for norovirus, and treatment is based on individual signs and symptoms. […] Bleach-based disinfectants can kill norovirus. […] The health department investigators determined that the combination of inadequate disinfection and aerosolization of viral particles from vacuum cleaning likely contributed to further spread of norovirus throughout the event facility.

• #54 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. Noroviruses are highly contagious. They commonly spread through food or water that is contaminated during preparation or through contaminated surfaces. Noroviruses can also spread through close contact with a person who has norovirus infection. […] Noroviruses are highly contagious. That means the norovirus infection can easily spread to others. The virus is shed in stool and vomit. You can spread the virus from the time you first have symptoms of illness until several days after you recover. Noroviruses can stay on surfaces and objects for days or weeks. […] You can get norovirus infection by: Eating contaminated food, Drinking contaminated water, Touching your hand to your mouth after your hand has been in contact with a contaminated surface or object, Being in close contact with a person who has norovirus infection. […] Noroviruses are difficult to kill because they can withstand hot and cold temperatures and many disinfectants.

• #55 What is Norovirus? | Poison Control

  https://www.poison.org/articles/what-is-norovirus

  Common symptoms of norovirus infection include nausea, vomiting, diarrhea, stomach aches, and headache. […] There is no cure for norovirus, and treatment is based on individual signs and symptoms. […] Bleach-based disinfectants can kill norovirus. […] The health department investigators determined that the combination of inadequate disinfection and aerosolization of viral particles from vacuum cleaning likely contributed to further spread of norovirus throughout the event facility.

• #56 Norovirus – Wikipedia

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

  Norovirus, also known as Norwalk virus and sometimes referred to as the winter vomiting disease, is the most common cause of gastroenteritis. Infection is characterized by non-bloody diarrhea, vomiting, and stomach pain. […] The virus is usually spread by the fecal–oral route. This may be through contaminated food or water or person-to-person contact. It may also spread via contaminated surfaces or through air from the vomit of an infected person. Risk factors include unsanitary food preparation and sharing close quarters. […] Causes: Norovirus. […] Norovirus results in about 685 million cases of disease and 200,000 deaths globally a year. It is common both in the developed and developing world. […] Norovirus infections occur more commonly during winter months. It often occurs in outbreaks, especially among those living in close quarters. In the United States, it is the cause of about half of all foodborne disease outbreaks.

• #57 Norovirus: Symptoms, Treatment, Prevention, and MoreHealthline

  https://www.healthline.com/health/norovirus

  Norovirus is a stomach and intestinal virus that’s very contagious. It passes easily through direct or indirect contact with an infected person. It can spread quickly in close quarters such as hospitals, schools, and day care centers. […] Norovirus is thought to be the most common cause of acute gastroenteritis in the world, leading to 685 million cases a year. Gastroenteritis is inflammation and infection of the stomach and intestinal tract caused by any infectious organism, like bacteria and viruses. Norovirus is responsible for up to 21 million illnesses in the United States each year. […] It all starts when you come into contact with the virus. It could be lurking on your food. Or perhaps you touch an infected light switch or hold someone’s hand before touching your mouth or nose. That’s when those tiny particles gain entry to your body. […] Most of the time, your antibodies will claim victory over the virus within one to three days. But your body can continue to shed the virus for up to two weeks or longer.

• #58 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. […] Norovirus is a member of the Caliciviridae family of viruses. These viruses are responsible for about 90% of viral gastroenteritis outbreaks and close to 50% of cases across the world. […] According to the Centers for Disease Control and Prevention (CDC), norovirus causes gastroenteritis in 19–21 million people per year in the United States. The virus is also responsible for 109,000 annual hospitalizations and 900 deaths in the U.S. every year. […] The Department of Health and Human Services suggest that the following are the most common causes of human norovirus infections: contaminated foods, shellfish, ready-to-eat foods, such as salads, ice, cookies, fruit, and sandwiches, that a worker with a norovirus infection has handled, any food that contains particles of the feces or vomit of a person with norovirus.

• #59 What is norovirus and what are symptoms? What to know as cases rise – NBC Chicago

  https://www.nbcchicago.com/news/local/what-is-norovirus-and-what-are-the-symptoms-what-to-look-for-as-cases-surge-in-parts-of-us/3634414/

  Norovirus — also referred to as „the stomach bug” or „food poisoning” — is characterized by sudden vomiting and diarrhea. […] According to the CDC, norovirus is the leading cause of foodborne illness in the United States, responsible for 58% of such infections acquired in the country each year. […] Norovirus infections are caused by a group of viruses that spread easily, with as few as 10 viral particles having the ability to make someone sick, health experts say. […] Most norovirus outbreaks occur when people who are already infected spread the virus to others by direct means, such as through sharing food or eating utensils. Outbreaks can also be spread through food, water or contaminated surfaces. […] Illness caused by norovirus typically starts suddenly, with symptoms developing 12 to 48 hours following exposure to the virus. Most people get better within one to three days and recover fully. […] But with 19 to 21 million illnesses each year in the United States, norovirus nevertheless causes on average 900 deaths and 109,000 hospitalizations annually, mostly among adults aged 65 and older.

• #60 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. While it is sometimes called the “stomach flu” or “stomach bug,” norovirus is not related to the flu, which is caused by the influenza virus. […] Norovirus is the leading cause of acute gastroenteritis among people of all ages in the United States. It is possible to get sick at any time of the year, but illnesses are most common between November and April. […] 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.

• #61 Norovirus – StatPearls – NCBI BookshelfTwitterFacebookLinkedInGitHubNCBI Insights BlogTwitterFacebookYoutube

  https://www.ncbi.nlm.nih.gov/books/NBK513265/

  Noroviruses are nonenveloped, positive-sense, single-stranded RNA viruses from the Caliciviridae family and are the leading cause of acute gastrointestinal illness worldwide. […] Noroviruses have 10 known genogroups and 49 genotypes. The classification into genogroups and genotypes is based on amino acid diversity in VP1 and ORF1 proteins. Human infections are predominantly due to genogroups GI, GII, and GIV, with GII being the most common cause of gastroenteritis. […] The primary mode of transmission of norovirus is fecal-oral. Sources include ingesting contaminated water or food or direct transmission from a contaminated surface or infected person. […] Norovirus outbreaks are common in several different settings. Norovirus is known to cause gastroenteritis outbreaks in hospitals and other healthcare facilities.

• #62 Norovirus and Managing Outbreaks | Vermont Department of Health

  https://www.healthvermont.gov/disease-control/foodborne-diarrheal-illnesses/norovirus-and-managing-outbreaks

  Norovirus is a very contagious virus that causes vomiting and diarrhea. You can get sick with norovirus by eating or drinking food or liquids that are contaminated with the virus, having contact with other people or surfaces carrying the virus or swimming in contaminated water. […] Norovirus can be found in your vomit or poop even before you start feeling sick. The virus can stay in your poop for two weeks or more after you feel better. […] An outbreak of norovirus-like illness is when two or more people with a common exposure (like being in a school or child care) are sick within 1-2 days of each other with the abrupt onset of gastrointestinal illness (e.g., vomiting, diarrhea).

• #63 Norovirus: Causes, symptoms and treatment | Live ScienceLive Science

  https://www.livescience.com/42944-what-is-norovirus.html

  In addition to humans, norovirus can infect a broad range of hosts including livestock, pets, and wild animals like marine mammals and bats. Norovirus may not be restricted to one host and might be able to jump the species barrier, according to a 2019 review published in the journal Viruses. […] Currently, there are no specific treatments or vaccines for norovirus infection, Yuan said. […] „Firstly, norovirus has many different strains, which can make it difficult to develop a vaccine that provides broad protection against all of them,” she said. It is also difficult to grow norovirus in a laboratory, which has hindered the development of a live oral or inactivated vaccine, she said.

• #64

  https://www.nbcnews.com/health/health-news/norovirus-treatment-guide-effective-methods-protection-rcna185872

  Norovirus, sometimes called the winter vomiting disease or two-bucket disease because it causes both vomiting and diarrhea is on the rise across the nation, even as seasonal flu is taking off and walking pneumonia rages on. […] Noroviruses have been called the perfect human pathogens. Theyre a type of highly contagious stomach bug that causes severe vomiting and diarrhea, along with headache, fever and body aches. […] The virus travels in vomit and diarrhea. It spreads by direct contact with someone who has norovirus, or by touching contaminated surfaces and then putting your fingers in your mouth. […] Shellfish, especially oysters and clams, are also known to spread the bug, because they are filter feeders and can accumulate the virus from untreated sewage flowing into their habitats. […] Even if you have had norovirus before, you can still be infected every year, because there are many different types of the bug, owing to the rapid mutation rate seen in RNA viruses like norovirus. […] Norovirus causes about 200,000 deaths worldwide each year.

• #65 Norovirus – StatPearls – NCBI BookshelfTwitterFacebookLinkedInGitHubNCBI Insights BlogTwitterFacebookYoutube

  https://www.ncbi.nlm.nih.gov/books/NBK513265/

  The average period from inoculation with the virus until clinical symptoms develop is 1.2 days, and norovirus symptoms usually resolve within 1 to 3 days. […] Host genetic factors appear to play a role in the susceptibility to norovirus, and specific IgG and IgA antibodies develop after infection. […] The management of norovirus infection involves treating the patient’s symptoms and mitigating the risk of an outbreak. […] Infection control is a priority in preventing norovirus outbreaks. While efforts at vaccine development are underway, hand hygiene, surface cleaning, and prevention of body fluid exposure are the mainstays of infection control. […] Norovirus vaccine development remains a priority for both the perceived public health and economic benefits. Developing a vaccine has been difficult because of the complex nature of norovirus, human immune responses, difficulty culturing the virus, and limited animal models for vaccine testing.

• #66 Norovirus – StatPearls – NCBI BookshelfTwitterFacebookLinkedInGitHubNCBI Insights BlogTwitterFacebookYoutube

  https://www.ncbi.nlm.nih.gov/books/NBK513265/

  The average period from inoculation with the virus until clinical symptoms develop is 1.2 days, and norovirus symptoms usually resolve within 1 to 3 days. […] Host genetic factors appear to play a role in the susceptibility to norovirus, and specific IgG and IgA antibodies develop after infection. […] The management of norovirus infection involves treating the patient’s symptoms and mitigating the risk of an outbreak. […] Infection control is a priority in preventing norovirus outbreaks. While efforts at vaccine development are underway, hand hygiene, surface cleaning, and prevention of body fluid exposure are the mainstays of infection control. […] Norovirus vaccine development remains a priority for both the perceived public health and economic benefits. Developing a vaccine has been difficult because of the complex nature of norovirus, human immune responses, difficulty culturing the virus, and limited animal models for vaccine testing.

• #67 Norovirus: Causes, symptoms and treatment | Live ScienceLive Science

  https://www.livescience.com/42944-what-is-norovirus.html

  In addition to humans, norovirus can infect a broad range of hosts including livestock, pets, and wild animals like marine mammals and bats. Norovirus may not be restricted to one host and might be able to jump the species barrier, according to a 2019 review published in the journal Viruses. […] Currently, there are no specific treatments or vaccines for norovirus infection, Yuan said. […] „Firstly, norovirus has many different strains, which can make it difficult to develop a vaccine that provides broad protection against all of them,” she said. It is also difficult to grow norovirus in a laboratory, which has hindered the development of a live oral or inactivated vaccine, she said.

• #68 Norovirus – StatPearls – NCBI BookshelfTwitterFacebookLinkedInGitHubNCBI Insights BlogTwitterFacebookYoutube

  https://www.ncbi.nlm.nih.gov/books/NBK513265/

  The average period from inoculation with the virus until clinical symptoms develop is 1.2 days, and norovirus symptoms usually resolve within 1 to 3 days. […] Host genetic factors appear to play a role in the susceptibility to norovirus, and specific IgG and IgA antibodies develop after infection. […] The management of norovirus infection involves treating the patient’s symptoms and mitigating the risk of an outbreak. […] Infection control is a priority in preventing norovirus outbreaks. While efforts at vaccine development are underway, hand hygiene, surface cleaning, and prevention of body fluid exposure are the mainstays of infection control. […] Norovirus vaccine development remains a priority for both the perceived public health and economic benefits. Developing a vaccine has been difficult because of the complex nature of norovirus, human immune responses, difficulty culturing the virus, and limited animal models for vaccine testing.

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