Sero-conversion after oral polio vaccine.
D000914:Antibodies, Viral / Q000276:immunology*; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D011051:Poliomyelitis / Q000276:immunology*; D017955:Poliovirus / Q000276:immunology*; D011055:Poliovirus Vaccine, Oral / Q000276:immunology*
D000914:Antibodies, Viral; D011055:Poliovirus Vaccine, Oral