Polio Vaccine Jonas Salk - 搜索图片

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historynet.com
When 2 Million American Schoolchildren Field-Tested t…
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skepticalraptor.com
Polio vaccine – thanks Dr. Jonas Salk for saving so many lives
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Britannica
Jonas Salk, Albert Sabin, and polio vaccination explained | Britannica
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WPXI
65 years ago, Jonas Salk, team at Pitt get polio vaccine approved

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Britannica
Polio vaccine | Description, History, …
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scientificamerican.com
Remembering Polio Vaccine Developer Jonas Salk a Century after His ...
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Britannica
Jonas Salk | Biography, Facts, & Polio Vaccine | Britannica
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slate.com
Polio vaccine, Jonas Salk: How a medical mystery threatened to derail …

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