title: Illnesses among children in municipal day nurseries and kindrgartens in Helsinki.
mesh_terms: D002644:Chickenpox / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D003139:Common Cold / Q000453:epidemiology; D003141:Communicable Diseases / Q000453:epidemiology*; D005387:Finland; D006801:Humans; D007223:Infant; D008457:Measles / Q000453:epidemiology; D012578:Schools, Nursery; D014917:Whooping Cough / Q000453:epidemiology