title: Changing age distribution of notified infectious hepatitis in Sydney.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001315:Australia; D002648:Child; D002675:Child, Preschool; D006506:Hepatitis A / Q000453:epidemiology*; D006801:Humans; D007223:Infant; D008875:Middle Aged