[Epidemiologic study of HAV and HBV infections in persons in various environments].
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D004781:Environmental Exposure; D005260:Female; D006506:Hepatitis A / Q000453:epidemiology*; D006509:Hepatitis B / Q000453:epidemiology*; D006801:Humans; D007223:Infant; D007564:Japan; D008297:Male; D008875:Middle Aged