Surveillance of outbreaks of small round structured virus infection.
D017250:Caliciviridae Infections / Q000453:epidemiology*; D003430:Cross-Sectional Studies; D004196:Disease Outbreaks; D004739:England / Q000453:epidemiology; D005759:Gastroenteritis / Q000453:epidemiology*; D006801:Humans; D015994:Incidence; D009663:Norwalk virus; D011159:Population Surveillance; D014852:Wales / Q000453:epidemiology