Gates Foundation on Twitter: "Happy 100th birthday to Jonas Salk! His invention of the polio vaccine has saved millions from paralysis. #EndPolio http://t.co/QJkWL2vaKo" / Twitter
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The Polio Pioneer: Dr. Jonas Salk and the Polio Vaccine: Marshall, Linda Elovitz, Anchin, Lisa: 9780525646518: Amazon.com: Books
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