Oral poliomyelitis vaccines.
Chen
R T
RT
D006801:Humans; D017589:Immunization Programs; D011051:Poliomyelitis / Q000517:prevention & control*; D011054:Poliovirus Vaccine, Inactivated; D011055:Poliovirus Vaccine, Oral; D014481:United States
D011054:Poliovirus Vaccine, Inactivated; D011055:Poliovirus Vaccine, Oral