טוויטר \ Gates Foundation בטוויטר: "Happy 100th birthday to Jonas Salk! His invention of the polio vaccine has saved millions from paralysis. #EndPolio http://t.co/QJkWL2vaKo"
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The Pathologist - #onthisday in 1914, Jonas Salk - inventor of the polio vaccine - was born. | Facebook
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1957 Dr. Jonas Salk, Polio Vaccine Inventor "In the Lab" with Equipment Photo | eBay
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Jonas Salk, inventor of the first polio vaccine - Stock Image - H419/0028 - Science Photo Library
Inventor of the Polio Vaccine Dr. Jonas E. Salk Posing for a Picture' Premium Photographic Print - Al Fenn | AllPosters.com
8 Things You May Not Know About Jonas Salk and the Polio Vaccine - HISTORY