Trivalent oral polio vaccine: disappointing results.
D000906:Antibodies / Q000032:analysis; D006801:Humans; D007115:Immunization Schedule; D007194:India; D007223:Infant; D011055:Poliovirus Vaccine, Oral; D014330:Tropical Medicine
D000906:Antibodies; D011055:Poliovirus Vaccine, Oral