title: Measles surveillance.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D004739:England / Q000453:epidemiology; D006801:Humans; D007223:Infant; D008457:Measles / Q000453:epidemiology*; D014852:Wales / Q000453:epidemiology