Virus infection in the Blackburn area 1962-69.
D002648:Child; D002675:Child, Preschool; D004739:England; D004769:Enterovirus Infections / Q000453:epidemiology; D006801:Humans; D012141:Respiratory Tract Infections / Q000453:epidemiology; D012621:Seasons; D014777:Virus Diseases / Q000453:epidemiology*