Oral polio vaccination and factors affecting its efficacy.
D000914:Antibodies, Viral; D002675:Child, Preschool; D005243:Feces / Q000382:microbiology; D006801:Humans; D007223:Infant; D011051:Poliomyelitis / Q000276:immunology / Q000517:prevention & control*; D011055:Poliovirus Vaccine, Oral
D000914:Antibodies, Viral; D011055:Poliovirus Vaccine, Oral