title: Epidemiology of chickenpox. 1977-1990.
mesh_terms: D000293:Adolescent; D000328:Adult; D002644:Chickenpox / Q000453:epidemiology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D012846:Singapore / Q000453:epidemiology