Norovirus is a highly contagious virus that causes gastroenteritis, an infection of the stomach and intestines that leads to symptoms such as vomiting, diarrhea, nausea, and stomach cramps. It spreads easily through contact with infected individuals, contaminated food or water, or contaminated surfaces, and is a common cause of outbreaks in places where people gather closely together, such as cruise ships, schools, hospitals, and nursing homes. Although illness is usually short-lived, norovirus spreads rapidly and is one of the leading causes of foodborne illness worldwide.
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