Norovirus
10 Épidémie ActivesNorovirus is a highly contagious virus that causes acute gastroenteritis, inflammation of the stomach and intestines. Often called the 'stomach flu' or 'winter vomiting bug,' it is the leading cause of foodborne illness outbreaks worldwide.
Qu'est-ce que Norovirus?
Norovirus is the leading cause of vomiting and diarrhea from acute gastroenteritis in the United States and globally. It causes approximately 21 million illnesses, 70,000 hospitalizations, and 800 deaths annually in the U.S. alone. The virus is extremely contagious - just a few viral particles can cause infection, and infected people can shed billions of virus particles.
SymptĂ´mes
- Sudden onset of nausea and vomiting
- Watery diarrhea
- Stomach cramps and abdominal pain
- Low-grade fever
- Body aches and headache
- Fatigue and weakness
Transmission
Norovirus spreads through contaminated food or water, contact with contaminated surfaces, and direct person-to-person contact. The virus is extremely contagious and only a few viral particles are needed to cause infection. Outbreaks are common in closed environments like cruise ships, schools, and nursing homes.
Période de Contagiosité : From symptom onset through at least 3 days after recovery (virus can be shed up to 2 weeks)
Prévention
- Thorough handwashing with soap and water (alcohol sanitizers less effective)
- Wash fruits and vegetables before eating
- Cook shellfish thoroughly
- Clean and disinfect contaminated surfaces with bleach-based cleaners
- Stay home when sick and for 48 hours after symptoms resolve
- Avoid preparing food for others when ill
- Wash laundry thoroughly if contaminated
Live Norovirus Global Case Map
3 countries with reported activity. Updated from real-time surveillance data.
United States — State Detail
1 state with reported activity. Click a state for detailed surveillance.
Épidémies Actives et Cas Récents
Renseignements en temps réel issus de la surveillance sanitaire mondiale et de la surveillance par IA
Sources de données : BEACON, ProMED, OMS, CDC et plus de 50 agences nationales de santé
✓ Données en direct mises à jour en temps réel depuis les sources de santé mondiales
Norovirus Sickens Hundreds in Russia Water Supply Suspected
An acute intestinal infection outbreak in Murom has rapidly escalated to 375 cases over four days, with norovirus identified as the likely pathogen and waterborne transmission under investigation following suspected water infrastructure contamination. Authorities have mobilized comprehensive response measures including hepatitis A vaccination campaigns, water chlorination, and increased bottled water distribution, though the outbreak's trajectory depends on resolving potential ongoing water system breaches and controlling secondary person-to-person transmission.
Source: BEACON - View Full Report
Demand for cruises appears undimmed despite hantavirus and other onboard outbreaks
Recent outbreaks of hantavirus and norovirus on cruise ships are making headlines, but they're unlikely to dim the growing popularity of vacation cruises, according to industry representatives and travel experts.
In fact, many within the industry still expect a record number of people worldwide to take cruises this year despite three passengers aboard the MV Hondius dying from hantavirus after the ship stopped in Argentina and a recent norovirus outbreak aboard a British ship docked in Bordeaux,
đź“° 22 news sources reporting on this story.
Hantavirus vs Norovirus: Which Viral Infection Is Deadlier?
Norovirus is a highly contagious virus
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Summary is AI-generated, newsroom-reviewed
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A norovirus outbreak on Caribbean Princess sickened 102 passengers and 13 crew members
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Norovirus causes gastroenteritis with symptoms like vomiting, diarrhea, and stomach cramps
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Hantavirus is deadlier, causing severe lung and kidney issues with a 35%-50% fatality rate
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While different parts of the world contin
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Norovirus Hits French Ski Resort: 100 Adolescents Sick
This event envelope contains reports on norovirus outbreaks in France.
Source: BEACON - View Full Report
What Is 'Vomiting Virus' Spreading Across US; Symptoms, Causes And Prevention, All You Need To Know
Norovirus cases are sharply rising acrossUS, CDC data and wastewater show massive spread, officials urge hygiene, handwashing and staying home to prevent dehydration and outbreaks
A highly contagious stomach virus commonly known as the "vomit bug" is spreading across the United States, with health officials reporting a sharp rise in norovirus activity in several regions of the country.
Norovirus is the leading cause of foodborne illness in the US and is responsible for millions of cases of acut
đź“° 11 news sources reporting on this story.
Shellfish recall issued over potential norovirus contamination
The FDA is asking restaurants and retailers to immediately stop serving and selling the product and throw them away.
The Food & Drug Administration (FDA) has issued a recall of some shellfish that were distributed in at least four states because of possible norovirus concerns.
The recall impacts shellfish from Gomez Shellfish, LLC that were harvested between March 22 and April 9 from Parts of Hammersley Inlet, WA.
What we know:
Restaurants and retailers from at least four states received ship
Norovirus on cruise ships: Why soap and water still matter -- Dr Muhammad Amir Yunus
MAY 26 -- When news emerged of a norovirus outbreak aboard the Caribbean Princess cruise ship recently, many Malaysians may not have paid much attention to it. Stomach bugs during travel are often assumed to be routine food poisoning or a minor inconvenience that passes after a day or two.
But the outbreak, which affected more than 100 passengers and crew members, serves as a useful reminder that not all gastrointestinal infections behave the same way, and not all can be prevented using the habi
đź“° 11 news sources reporting on this story.
Norovirus Hits Pacific Crest Trail Hikers: Information Sought
This event envelope contains reports on norovirus outbreaks in the USA.
Source: BEACON - View Full Report
Norovirus Outbreak Sickens 115 on Cruise Ship
More than 100 passengers and 13 crew members on the Caribbean Princess reported being ill, according to the Centers for Disease Control and Prevention.
More than 100 people have been sickened in a norovirus outbreak on a cruise ship operated by Princess Cruises, the U.S. Centers for Disease Control and Prevention announced on Thursday.
Those sickened, who include 102 passengers and 13 crew members, have been isolated from uninfected travelers, the agency said.
The norovirus, which is fairly co
đź“° 15 news sources reporting on this story.
What Is Norovirus? Caribbean Princess Cruise Ship Outbreak Sparks Global Concern
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More than 100 fell ill during a norovirus outbreak on Caribbean Princess cruise ship
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Norovirus causes acute gastroenteritis with vomiting, diarrhoea, and stomach cramps
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Virus spreads rapidly in crowded places via contaminated food, water, and surfaces
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More than 100 passengers and crew members reportedly fell ill during a recent norovirus outbreak aboard the Caribbean Princess cruise ship, according to health authorities monito
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Ressources Expertes et Références
Informations fiables provenant des principales organisations de santé
CDC
Directives officielles des Centers for Disease Control and Prevention des États-Unis
Voir les Ressources du CDC →WHO
Surveillance mondiale des maladies et directives de l'Organisation Mondiale de la Santé
Voir les Ressources de l'OMS →Contenu Révisé Médicalement
Les informations sur les maladies sur Virus Watcher sont révisées par notre Épidémiologiste en Chef, ancien analyste principal du CDC pour les prévisions FluSight. Les données épidémiques sont agrégées à partir de sources vérifiées notamment BEACON, ProMED, OMS, CDC et plus de 50 agences nationales de santé. Ces informations sont à des fins éducatives et ne doivent pas remplacer les conseils médicaux professionnels.
Dernière révision : 2026-06-29
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