Gastroenteritis is inflammation (irritation) of your intestines. People usually call it a “stomach bug” or “stomach flu,” even though it’s not limited to just influenza. Although most people report stomach pain, gastroenteritis can also involve your small intestines and colon.
Stomach flu is common. More than 20 million people get sick each year in the U.S. with an intestinal upset. Viruses are the most common cause of stomach flu.
Anyone can come down with stomach flu. But you’re more likely to get it if you’re in a place where lots of people share living or dining spaces, such as: Children in daycare or at camp. Nursing homes. Students living in dormitories. Military personnel. Prisons. Psychiatric wards.
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