Norovirus is the leading cause of vomiting and diarrhea, and foodborne illness in the United States. People of all ages can get infected and sick with norovirus, which spreads very easily and quickly.
You can get norovirus illness many times in your life because there are many different types of noroviruses. Infection with one type of norovirus may not protect you against other types. It is possible to develop protection against specific types. But, it is not known exactly how long protection lasts. This may explain why so many people of all ages get infected during norovirus outbreaks. Your likelihood of getting a norovirus infection is also determined in part by your genes.
Learn more about symptoms of norovirus illness and dehydration.
Learn how norovirus spreads from person to person and through contaminated food, water, and surfaces.
Learn steps you can take to help protect yourself and others from getting infected with and sick from norovirus, including when camping.
Learn how to relieve symptoms if you get norovirus illness.