[Types and epidemiological features of acute viral hepatitis in children under 15 in Xian City].
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D002681:China; D006506:Hepatitis A / Q000453:epidemiology; D006509:Hepatitis B / Q000453:epidemiology; D006526:Hepatitis C / Q000453:epidemiology; D006525:Hepatitis, Viral, Human / Q000453:epidemiology*; D006801:Humans; D007223:Infant