The 50-year war.
D014943:Global Health; D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D011051:Poliomyelitis / Q000453:epidemiology / Q000276:immunology / Q000517:prevention & control* / Q000821:virology; D017955:Poliovirus / Q000276:immunology / Q000302:isolation & purification; D023321:Poliovirus Vaccines / Q000266:history / Q000276:immunology; D013997:Time Factors; D014611:Vaccination / Q000266:history* / Q000639:trends
D023321:Poliovirus Vaccines