Noroviruses

Noroviruses are a group of viruses that cause the “stomach flu,” or acute gastroenteritis (GAS-tro-en-ter-I-tis), in people.  Norovirus disease is usually not serious, although people may feel very sick and vomit many times a day. Most people get better within 1 or 2 days, and they have no long-term health effects related to their illness

Similar to Norwalk and Norwalk-Like Virus Infection.