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oct 28, 1914 - Jonas Salk
Description:
Jonas Edward Salk was an American medical researcher and virologist. He discovered and developed one of the first successful polio vaccines
Added to timeline:
Unit 7 Key Terms Timeline
By
Eric Ramirez
9 Apr 2018
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0
464
Date:
oct 28, 1914
Now
~ 111 years ago
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