Norwalk virus
Name: Norovirus
English: Winter vomiting disease; Winter vomiting virus; Stomach flu.
Genus with 1 species.
Clades: family Caliciviridae.
Biology
Norovirus is the most common cause of acute gastroenteritis. Each year t causes in the USA ± 20 million illnesses, ± 65000 hospitalizations and ± 700 deaths. Norovirus is also the most common cause of foodborne-disease outbreaks in the United States.