Hepatitis A and facilities for preschool children.
D002675:Child, Preschool; D003441:Crowding; D004196:Disease Outbreaks; D005260:Female; D006506:Hepatitis A / Q000453:epidemiology / Q000517:prevention & control / Q000635:transmission*; D006801:Humans; D006920:Hygiene; D008297:Male; D012189:Retrospective Studies; D012572:School Health Services; D012712:Serum Globulins / Q000008:administration & dosage; D014481:United States
D012712:Serum Globulins