title: [Epidemiologic study of viral hepatitis A in kindergartens and nurseries].
mesh_terms: D002648:Child; D002675:Child, Preschool; D002681:China; D004196:Disease Outbreaks / Q000453:epidemiology*; D006506:Hepatitis A / Q000453:epidemiology*; D006801:Humans; D009724:Nurseries, Infant