How effective is measles immunisation?
D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks / Q000453:epidemiology; D004739:England; D006801:Humans; D007223:Infant; D008457:Measles / Q000453:epidemiology*; D008458:Measles Vaccine
D008458:Measles Vaccine