From the Centers for Disease Control and Prevention. Progress toward poliomyelitis eradication--African Region, 1999-March 2000.
D000349:Africa / Q000453:epidemiology; D014943:Global Health; D006801:Humans; D017589:Immunization Programs; D011051:Poliomyelitis / Q000453:epidemiology* / Q000517:prevention & control*; D011055:Poliovirus Vaccine, Oral / Q000008:administration & dosage*
D011055:Poliovirus Vaccine, Oral