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Who among the following scientists invented the Polio vaccine?

A. Jonas Salk (an American, came into use in 1955)

B. Louis Pasteur

C. Charles Darwin

D. None of these

Customs Inspector-15

Explanation:

The first polio vaccine was the inactivated polio vaccine. It was developed by Jonas Salk and came into use in 1955. The oral polio vaccine was developed by Albert Sabin and came into commercial use in 1961.

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