What is "sapovirus"

Sapovirus is a genus of viruses, in the family Caliciviridae. Humans and swine serve as natural hosts. There is currently only one species in this genus: the type species Sapporo virus. Together with the Norwalk virus, these are the most common cause of acute viral gastroenteritis in adults. Unlike Noroviruses, however, Sapoviruses generally only causes mild gastroenteritis in young children. The type species (and the genus by extension) is named after Sapporo, Japan where the virus was first discovered following an outbreak of gastroenteritis in an orphanage.