Norovirus
Noroviruses, previously called "Norwalk-like viruses," are a group of viruses that cause acute gastroenteritis in humans. The most common symptoms are diarrhea, vomiting and stomach pain. Norovirus is the leading cause of foodborne-disease outbreaks in the United States and a common cause of outbreaks in long-term care facilities, schools, restaurants, and other group settings.
Noroviruses spread from person to person, through contaminated food or water, and by touching contaminated surfaces. The spread of norovirus illness can be controlled by following these simple measures: