Measles outbreak--Hempfield school district.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D006801:Humans; D007115:Immunization Schedule; D008457:Measles / Q000453:epidemiology*; D008458:Measles Vaccine / Q000008:administration & dosage; D010414:Pennsylvania
D008458:Measles Vaccine