[The campaign against poliomyelitis].
D002170:Canada; D049673:History, 20th Century; D006801:Humans; D007843:Latin America; D010175:Pan American Health Organization / Q000266:history*; D011051:Poliomyelitis / Q000266:history*; D011054:Poliovirus Vaccine, Inactivated / Q000266:history; D014480:United Nations / Q000266:history; D014481:United States
D011054:Poliovirus Vaccine, Inactivated
La campaña contra la poliomielitis.