From the Centers for Disease Control and Prevention. Progress toward global poliomyelitis eradication, 1985-1994.
D000349:Africa / Q000453:epidemiology; D000569:Americas / Q000453:epidemiology; D001208:Asia / Q000453:epidemiology; D005060:Europe / Q000453:epidemiology; D014943:Global Health; D006801:Humans; D017589:Immunization Programs; D011051:Poliomyelitis / Q000453:epidemiology* / Q000517:prevention & control*