THE POLIOMYELITIS IMMUNIZATION PROGRAMME IN SINGAPORE.
D002648:Child; D006801:Humans; D017589:Immunization Programs; D007223:Infant; D011051:Poliomyelitis; D011055:Poliovirus Vaccine, Oral; D023321:Poliovirus Vaccines; D012846:Singapore; D014611:Vaccination
D011055:Poliovirus Vaccine, Oral; D023321:Poliovirus Vaccines
CHILD; INFANT; POLIOMYELITIS; POLIOVIRUS VACCINE, ORAL; SINGAPORE; VACCINATION