who invented polio vaccine
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The development of effective vaccines to prevent paralytic polio was one of the major medical breakthroughs of the 20th century. Two different kinds of vaccine are available: An inactivated (killed) polio vaccine (IPV) developed by Dr. Jonas Salk and first used in 1955.
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The development of effective vaccines to prevent paralytic polio was one of the major medical breakthroughs of the 20th century. Two different kinds of vaccine are available: An inactivated (killed) polio vaccine (IPV) developed by Dr. Jonas Salk and first used in 1955.
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