Poliomyelitis in the RSA--epidemiology, monitoring and control.
D003906:Developing Countries; D006801:Humans; D007114:Immunization; D011051:Poliomyelitis / Q000453:epidemiology* / Q000276:immunology / Q000517:prevention & control; D011054:Poliovirus Vaccine, Inactivated; D011055:Poliovirus Vaccine, Oral; D013019:South Africa
D011054:Poliovirus Vaccine, Inactivated; D011055:Poliovirus Vaccine, Oral