Hepatitis: epidemiology and mainliners.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D004196:Disease Outbreaks; D005260:Female; D006506:Hepatitis A / Q000453:epidemiology / Q000209:etiology*; D006801:Humans; D007275:Injections, Intravenous / Q000009:adverse effects*; D008297:Male; D012737:Sex Factors; D019966:Substance-Related Disorders / Q000150:complications*; D014481:United States