Biology, asked by kausers272, 3 months ago

...................... discovered first polio - vaccine ( 1952) and oral vaccine for polio was discovered by ..................... in 1957​

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Answered by meenakshidehury2
5

Dr.Jonas salk discovered first polio - vaccine (1952) and oral vaccine for polio was discovered byDr.Albert Sabin in 1957.

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