Norovirus causes about 20 million gastroenteritis cases each year in the United States. Anyone can be infected with norovirus and get sick, and, you can get norovirus illness more than once during your life.
There's no vaccine to prevent infection and no drug to treat it.
The illness often begins suddenly. You may feel very sick, with stomach cramping, vomiting, or diarrhea.
Noroviruses are the most common cause of gastroenteritis in the United States. About 1 in every 15 Americans will get norovirus illness each year, so wash your hands often and follow our simple tips to stay healthy.