title: Measles in previously vaccinated children in Illinois.
mesh_terms: D002648:Child; D002675:Child, Preschool; D006801:Humans; D007087:Illinois; D008457:Measles / Q000453:epidemiology / Q000276:immunology / Q000517:prevention & control*; D008458:Measles Vaccine / Q000627:therapeutic use*; D014611:Vaccination
chemical_list: D008458:Measles Vaccine