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Who developed the first effective vaccine against polio? A. Jonas Salk B. Norman Borlaug C. Vladimir Zworykin D. Marshall McLuhan

Who developed the first effective vaccine against polio? A. Jonas Salk B. Norman Borlaug C. Vladimir Zworykin D. Marshall McLuhan
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Who developed the first effective vaccine against polio?

A. Jonas Salk


B. Norman Borlaug


C. Vladimir Zworykin


D. Marshall McLuhan

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User Pernille
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2 Answers

4 votes
I believe the answer is, A, Jonas Salk. I hope this helps!
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User BitBank
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8.2k points
4 votes
Your answer is A. Jonas Salk
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User Filmjamr Movies
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7.6k points
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