title: Measles outbreak among vaccinated high school students--Illinois.
mesh_terms: D000293:Adolescent; D002675:Child, Preschool; D004196:Disease Outbreaks / Q000453:epidemiology*; D006801:Humans; D007087:Illinois; D008297:Male; D008457:Measles / Q000453:epidemiology* / Q000517:prevention & control; D014611:Vaccination