Noroviruses

 Noroviruses is the name given to a group of related single-stranded RNA viruses that have recently been classified in the family Caliciviridae, genus Norovirus. These highly infectious enteric viruses are a major cause of acute gastroenteritis in humans (the infection is often called viral gastroenteritis). Although many cases are caused by person-to-person spread, the ingestion of contaminated food or water also plays a significant part in their transmission.

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