Coast-to-coast polio drive to counter epidemic in Africa.
D000349:Africa / Q000453:epidemiology; D002648:Child; D005002:Ethiopia / Q000453:epidemiology; D006801:Humans; D007391:International Cooperation; D011051:Poliomyelitis / Q000453:epidemiology / Q000517:prevention & control*; D011055:Poliovirus Vaccine, Oral / Q000008:administration & dosage*
D011055:Poliovirus Vaccine, Oral