Norovirus is a very contagious virus that causes vomiting and diarrhea. Anyone can get infected and sick with norovirus. Norovirus is sometimes called the “stomach flu” or “stomach bug”. However, norovirus illness is not related to the flu, which is caused by influenza virus. Discover norovirus symptoms, how the virus spreads, and how to prevent norovirus.
The most common symptoms are:
- Stomach pain
Protect yourself and others from norovirus:
- Wash your hands often
- Rinse fruits and vegetables
- Cook shellfish thoroughly
- Stay home when sick and for two days after symptoms stop
- Avoid preparing food for others when sick and for two days after symptoms stop
Outbreaks can happen anytime, but they occur most often from November to April. Learn more about norovirus illness in the United States and worldwide.
Learn more about specimens and laboratory testing for diagnosing norovirus infection.
Find information for healthcare providers and health departments.
Learn more from scientific articles and educational materials related to norovirus.