Persistence of antibodies in a population immunized with oral poliovaccine (OPV).
D000293:Adolescent; D000328:Adult; D000914:Antibodies, Viral / Q000096:biosynthesis*; D000918:Antibody Specificity; D002648:Child; D002675:Child, Preschool; D003604:Czechoslovakia; D005500:Follow-Up Studies; D006801:Humans; D009500:Neutralization Tests; D017955:Poliovirus / Q000276:immunology*; D011055:Poliovirus Vaccine, Oral / Q000276:immunology*
D000914:Antibodies, Viral; D011055:Poliovirus Vaccine, Oral