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. [1] [6] Infection is characterized by non-bloody diarrhea, vomiting, and stomach pain. [2] [3] Fever or headaches may also occur. [2] Symptoms usually develop 12 to 48 hours after being exposed, and

https://www.britannica.com/science/Norovirus
norovirus, (genus Norovirus ), genus consisting of one species of virus, known as Norwalk virus (family Caliciviridae), that frequently gives rise to outbreaks of foodborne and waterborne gastroenteritis in humans. Norovirus is highly contagious, being spread easily through contact with an infected person, contact with contaminated surfaces, or

https://www.mayoclinic.org/diseases-conditions/norovirus/symptoms-causes/syc-20355296
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. You can continue to shed virus in your stool for several weeks after recovery.

https://www.ncbi.nlm.nih.gov/books/NBK513265/
Noroviruses are nonenveloped, positive-sense, single-stranded RNA viruses belonging to the Caliciviridae viral family. The virus was first identified and named "Norwalk virus" when it was discovered as the cause of a 1968 outbreak of gastroenteritis in Norwalk, Ohio. Norovirus is a common cause of acute gastrointestinal illness worldwide. In developed countries with rotavirus vaccine

https://eportal.mountsinai.ca/Microbiology/faq/norwalkfaq.shtml
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. 25-50% of patients report headache, nausea, malaise, myalgias and low-grade fever. It is important to note that there

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8707792/
Abstract. Human Norovirus is currently the main viral cause of acute gastroenteritis (AGEs) in most countries worldwide. Nearly 50 years after the discovery of the "Norwalk virus" by Kapikian and colleagues, the scientific and medical community continue to generate new knowledge on the full biological and disease spectrum of Norovirus

https://www.health.state.mn.us/diseases/norovirus/index.html
Norovirus Infection (aka Norwalk virus, calicivirus, viral gastroenteritis) Noroviruses are members of a group of viruses called caliciviruses also known previously as "Norwalk-like viruses.". Norovirus facts, including common symptoms and how the disease is spread. Required reporting information, clinical features, laboratory diagnosis

https://emedicine.medscape.com/article/224225-overview
Norovirus, formerly referred to as Norwalk virus, is a very contagious virus that causes acute gastroenteritis. People of all ages can get infected and sick with norovirus. The most common symptoms of norovirus are diarrhea, vomiting, nausea, and stomach pain. Other symptoms include fever, headache, and body ache.

https://www.health.ny.gov/diseases/communicable/norwalk/fact_sheet.htm
What is norovirus infection? Noroviruses are a group of related viruses that cause acute gastrointestinal illness sporadically or in outbreaks. Noroviruses are sometimes referred to as "Norwalk virus" or "Norwalk-like virus," based on the name given to the first strain identified in the 1970s.

https://my.clevelandclinic.org/health/diseases/17703-norovirus
Having a dry mouth. Feeling weak or dizzy. A headache. Children may have the above symptoms, along with: Crying without tears. Fussiness. Sleepiness throughout the day. Norovirus can make it difficult for you to eat or drink because the inflammation in your intestines and stomach causes you to vomit or have diarrhea.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9781483/
Norovirus (NoV) is an enteric non-enveloped virus which is the leading cause of gastroenteritis across all age groups. It is responsible for around 200,000 deaths annually and outbreaks are common in small communities such as educational and care facilities. 40% of all NoV outbreaks occur in long-term and acute-care facilities, forming the

https://www.healthlinkbc.ca/health-topics/noroviruses-norwalk-viruses
The symptoms of gastroenteritis caused by the noroviruses include nausea, vomiting, diarrhea, and abdominal (belly) pain. Diarrhea and vomiting can cause dehydration. You may have a headache and a fever. A mild and brief illness usually develops 24 to 48 hours after you eat or drink the contaminated food or water and lasts for 48 to 72 hours.

https://www.nejm.org/doi/full/10.1056/NEJMoa1101245
Vaccination also reduced the relative frequency of Norwalk virus infection after challenge with the virus, with infection occurring in 82% of placebo recipients and 61% of vaccine recipients, for

https://healthy.kaiserpermanente.org/health-wellness/health-encyclopedia/he.noroviruses-norwalk-viruses.ug2076
The symptoms of gastroenteritis caused by the noroviruses include nausea, vomiting, diarrhea, and abdominal (belly) pain. Diarrhea and vomiting can cause dehydration. You may have a headache and a fever. A mild and brief illness usually develops 24 to 48 hours after you eat or drink the contaminated food or water and lasts for 48 to 72 hours.

https://www.webmd.com/food-recipes/food-poisoning/norovirus-symptoms-and-treatment
Wash your hands often with soap and water for at least 20 seconds. Avoid raw or undercooked oysters . Thoroughly wash raw fruits and vegetables. Sources. Update History. Norovirus is a highly

https://microbenotes.com/norwalk-virus-norovirus/
Structure of Norwalk Virus (Norovirus) The virus is non-enveloped, round, 27-nm particles with a 'ragged' outer edge but lacking a definite surface structure. It has a buoyant density of 1.33-1.41 g/cm3, an inability to propagate in vitro. Characteristically, Norwalk virus possesses a single capsid protein.

https://www.sketchy.com/medical-lessons/norovirus-norwalk-virus-caliciviridae
Summary. The norovirus is a positive-sense, single-stranded, naked RNA virus in the Caliciviridae family. Like other positive-sense RNA viruses, norovirus replicates in the cytoplasm, where its positive-sense genome is directly used to produce one long polyprotein that is processed and cleaved by viral proteases into smaller, active constituents.

https://pubmed.ncbi.nlm.nih.gov/18551613/
Abstract. Noroviruses are major agents of viral gastroenteritis worldwide. The infectivity of Norwalk virus, the prototype norovirus, has been studied in susceptible human volunteers. A new variant of the hit theory model of microbial infection was developed to estimate the variation in Norwalk virus infectivity, as well as the degree of virus

https://www.osmosis.org/learn/Norovirus
Norovirus is a single-strand RNA virus of the calicivirus family, which is known to cause a very contagious form of gastroenteritis.It is transmitted via the fecal-oral route and droplets of vomit.Affected people commonly present with diarrhea, vomiting, and abdominal pain.Other symptoms may include fever, headache, and muscle aches. Treatment focuses on supportive management, with the

https://www.mass.gov/info-details/noroviruses-norwalk-like-viruses
Norwalk virus, Norwalk-like viruses (NLV) or noroviruses are a group of viruses (germs) that cause diarrheal illnesses. These viruses are named after the original strain that caused an outbreak in Norwalk, Ohio. They are also sometimes referred to as small, round-structured viruses (SRSV) or caliciviruses.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4284304/
Norovirus, an RNA virus of the family Caliciviridae, is a human enteric pathogen that causes substantial morbidity across both health care and community settings.Several factors enhance the transmissibility of norovirus, including the small inoculum required to produce infection (<100 viral particles), prolonged viral shedding, and its ability to survive in the environment.

http://www.bccdc.ca/health-info/diseases-conditions/norovirus-norwalk-like-virus
Norovirus / Norwalk-like virus. Norovirus is the term used to describe a group of viruses that belong to the Calicivirus family, and which cause a very common gastroenteritis. Outbreaks are less noticeable in the general community, but become much more noticeable in "closed communities" such as long term care and acute care facilities.

https://pubmed.ncbi.nlm.nih.gov/22150036/
Seventy-seven of 84 participants inoculated with Norwalk virus were included in the per-protocol analysis. Vaccination significantly reduced the frequencies of Norwalk virus gastroenteritis (occurring in 69% of placebo recipients vs. 37% of vaccine recipients, P=0.006) and Norwalk virus infection (82% of placebo recipients vs. 61% of vaccine