13 Things You Should Know About Stomach Flu

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A flu shot won't help

When people say "the flu" they mean influenza, a virus that circulates the globe each year attacking the nose and throat as it spreads through communities in waves. Flu shots protect against this virus—not ones that cause viral gastroenteritis.

The confusion may be due to some symptom overlap, such as body aches, nausea, and low-grade fever, says Gary Rogg, MD, an internist at Montefiore Medical Center in New York City.

But a flu shot won't protect against stomach bugs. There's no such thing as a stomach-flu shot (at least for grown-ups).

Next: Culprit, thy name is norovirus