Effect of a single dose of oral poliovirus vaccine in persons previously immunized with inactivated vaccine.
D006801:Humans; D011051:Poliomyelitis / Q000276:immunology*; D011055:Poliovirus Vaccine, Oral; D014611:Vaccination; D015164:Vaccines, Inactivated
D011055:Poliovirus Vaccine, Oral; D015164:Vaccines, Inactivated
POLIOMYELITIS/immunology