History of Polio - Part II: Progress in the Americas

Part I: Suffering the disease History of Polio - Part I: Suffering ...
Part II: Progress in the Americas History of Polio - Part II: Progress ...
Part III: The Polio Endgame History of Polio - Part III: The Poli...
(Español: Historia de la Polio - Parte I: Sufri...)

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