title: Differentiation of sources in a hepatitis outbreak.
mesh_terms: D000293:Adolescent; D000328:Adult; D000818:Animals; D002648:Child; D002675:Child, Preschool; D004812:Epidemiologic Methods; D005260:Female; D005516:Food Microbiology; D006506:Hepatitis A / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008892:Milk / Q000382:microbiology; D012572:School Health Services; D012758:Shellfish; D012924:Social Conditions; D014481:United States; D014871:Water Microbiology