who was discovered the vaccine for polio in the
oral from [drops)
1)Jonas salk
2) Albert Sabin
3)Edward Jenner
4) Alexander fleming.
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An inactivated (killed) polio vaccine (IPV) developed by Dr. Jonas Salk and first used in 1955, and. A live attenuated (weakened) oral polio vaccine (OPV) developed by Dr. Albert Sabin and first used in 1961.
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jonas Salk.................
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