The certification of wild poliovirus eradication from the Western Hemisphere.
D000569:Americas / Q000453:epidemiology; D014943:Global Health; D006801:Humans; D017589:Immunization Programs / Q000592:standards; D011051:Poliomyelitis / Q000453:epidemiology / Q000517:prevention & control*; D017955:Poliovirus / Q000302:isolation & purification*; D011159:Population Surveillance