PREVENTION OF POLIOMYELITIS IN SINGAPORE BY LIVE VACCINE.
D004770:Enterovirus; D006801:Humans; D009500:Neutralization Tests; D011051:Poliomyelitis; D011055:Poliovirus Vaccine, Oral; D023321:Poliovirus Vaccines; D012846:Singapore; D014776:Virus Cultivation
D011055:Poliovirus Vaccine, Oral; D023321:Poliovirus Vaccines
ENTEROVIRUS; NEUTRALIZATION TESTS; POLIOVIRUS VACCINE, ORAL; SINGAPORE; VIRUS CULTIVATION