Antipoliomyelitis program in Brazil; a erologic study of immunity levels.
D000914:Antibodies, Viral / Q000032:analysis*; D000917:Antibody Formation; D001938:Brazil; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D009500:Neutralization Tests; D010865:Pilot Projects; D011051:Poliomyelitis / Q000276:immunology / Q000517:prevention & control*; D011055:Poliovirus Vaccine, Oral / Q000008:administration & dosage; D012494:Sampling Studies; D014611:Vaccination; D014613:Vaccines, Attenuated
D000914:Antibodies, Viral; D011055:Poliovirus Vaccine, Oral; D014613:Vaccines, Attenuated