The polio vaccine was developed by

  1. Alexander Fleming
  2. Dr. Jonas Salk
  3. Both
  4. None of these
Anurag Mishra Professor Asked on 9th April 2016 in Health & Fitness.
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1 Answer(s)

Answer: (2) Dr. Jonas Salk

Anurag Mishra Professor Answered on 9th April 2016.
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