Jonas Salk is credited with discovery of polio vaccine. He tested the vaccine for the first time on whom?

Options :
  1. Cat
  2. Dog
  3. Himself,wife and 3 sons
  4. Sheep
Answer and Explanation :-

Answer: Option 3

Explanation:

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Think of the patience God has had for you and let it resonate to others. If you want a more patient world, let patience be your motto
-Steve Maraboli Unapologetically You: Reflections on Life and the Human Experience