Prior use of killed vaccine as a factor in measles incidence in Canada.
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D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D002170:Canada / Q000453:epidemiology; D002648:Child; D006801:Humans; D015994:Incidence; D008457:Measles / Q000453:epidemiology* / Q000517:prevention & control*; D008458:Measles Vaccine / Q000592:standards*; D014481:United States / Q000453:epidemiology; D015164:Vaccines, Inactivated / Q000008:administration & dosage*
D008458:Measles Vaccine; D015164:Vaccines, Inactivated