Clinical/subclinical case ratio in hepatitis A.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D002681:China; D004196:Disease Outbreaks; D006506:Hepatitis A / Q000453:epidemiology*; D006508:Hepatitis Antibodies / Q000032:analysis*; D006801:Humans; D007223:Infant; D011446:Prospective Studies
D006508:Hepatitis Antibodies