[Epidemiological study on Sabin's live vaccine against polimyelitis].
D016021:Epidemiologic Studies; D006801:Humans; D011051:Poliomyelitis / Q000276:immunology*; D011055:Poliovirus Vaccine, Oral; D014611:Vaccination
D011055:Poliovirus Vaccine, Oral
POLIOMYELITIS/immunology; VACCINATION