The 1961 Middletown Oral Poliovirus Vaccine Program. VI. Proporition of children vaccinated.
D002648:Child; D006801:Humans; D011051:Poliomyelitis / Q000276:immunology*; D011055:Poliovirus Vaccine, Oral
D011055:Poliovirus Vaccine, Oral
POLIOMYELITIS/immunology