The development of a poliomyelitis prevention programme.
D000293:Adolescent; D002675:Child, Preschool; D004739:England; D005260:Female; D006801:Humans; D008297:Male; D011051:Poliomyelitis / Q000453:epidemiology* / Q000517:prevention & control*; D011055:Poliovirus Vaccine, Oral
D011055:Poliovirus Vaccine, Oral