The first effective vaccine against polio was prepared by
(A) JH Gibbon
(B) Jonas E. Salk
(C) Robert Edwards
(D) James Simpson
Correct Answer : Jonas E. Salk
Explanation: Jones Edward Salk was an American medical researcher and virologist, best known for his discovery and development of the first polio vaccine. On April 12, 1955, Dr Thomas Francis of the University of Michigan monitored the test results and declared the vaccine to be safe and effective.
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