Polio immunising vaccine was developed by
-
E. Jenner
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Dr. Salk
-
St. Hale
-
Landsteiner
B
Correct answer
Explanation
Dr. Jonas Salk developed the first successful polio vaccine in 1955. His inactivated polio vaccine (IPV) was administered by injection and proved highly effective in preventing paralytic poliomyelitis, leading to a dramatic decline in polio cases worldwide.