title: Epidemic measles. Modification by killed virus vaccine, given two years previously.
mesh_terms: D002648:Child; D002675:Child, Preschool; D002986:Clinical Trials as Topic; D006801:Humans; D007223:Infant; D008457:Measles / Q000517:prevention & control*; D008458:Measles Vaccine
chemical_list: D008458:Measles Vaccine