title: Small round structured viruses (SRSV): numbers are increasing.
mesh_terms: D017250:Caliciviridae Infections / Q000453:epidemiology*; D004196:Disease Outbreaks; D004739:England / Q000453:epidemiology; D005759:Gastroenteritis / Q000453:epidemiology* / Q000821:virology; D006801:Humans; D009663:Norwalk virus; D011159:Population Surveillance; D014852:Wales / Q000453:epidemiology