Large-scale use of Sabin type 2 attenuated poliovirus vaccine in Singapore during a type 1 poliomyelitis epidemic.
D058872:Epidemics; D006801:Humans; D011051:Poliomyelitis / Q000517:prevention & control*; D017955:Poliovirus; D011055:Poliovirus Vaccine, Oral; D012846:Singapore
D011055:Poliovirus Vaccine, Oral
POLIOMYELITIS/prevention and control