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uranmaximum [27]
3 years ago
11

Who developed the first effective vaccine against polio?

History
2 answers:
-Dominant- [34]3 years ago
6 0
I believe the answer is, A, <span>Jonas Salk. I hope this helps!</span>
torisob [31]3 years ago
3 0
Your answer is A. Jonas Salk
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