title: [Occurrence of hepatitis A centering around a nursery school in Wakayama].
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D005260:Female; D006506:Hepatitis A / Q000453:epidemiology* / Q000635:transmission; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D012578:Schools, Nursery