[Observation on immunizing effect of live trivalent oral poliomyelitis vaccine].
D000914:Antibodies, Viral / Q000032:analysis; D002675:Child, Preschool; D006801:Humans; D007114:Immunization; D007223:Infant; D011051:Poliomyelitis / Q000517:prevention & control*; D011055:Poliovirus Vaccine, Oral / Q000276:immunology*; D013997:Time Factors
D000914:Antibodies, Viral; D011055:Poliovirus Vaccine, Oral