When you hear about norovirus, it's usually because of an outbreak on a cruise ship but it can actually affect you anywhere.
About 20 million people get sick from norovirus each year, most from close contact with infected people or by eating contaminated food.
Norovirus often gets attention for outbreaks on cruise ships, but those account for only about 1 percent of all reported norovirus outbreaks.
Norovirus is very contagious, and outbreaks can occur anywhere people gather or food is served.
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