Age and seasonal incidence in virus hepatitis.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D003604:Czechoslovakia; D005260:Female; D006506:Hepatitis A / Q000453:epidemiology*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D012424:Rural Population; D012621:Seasons; D014505:Urban Population