title: Viral hepatitis in Delhi during 1980 and 1981--an epidemiological evaluation.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D005260:Female; D006525:Hepatitis, Viral, Human / Q000453:epidemiology*; D006801:Humans; D007194:India; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D012621:Seasons; D012737:Sex Factors; D014505:Urban Population; D014871:Water Microbiology