The polio vaccine is made by _______ .
(1) Louis Pasteur
(2) Alexander Fleming
(3) Jonas Salk
(4) Leeuwenhoek
Answers
Answered by
2
Answer:
An inactivated (killed) polio vaccine (IPV) developed by Dr. Jonas Salk and first used in 1955.
Answered by
1
Answer:
option 3
Explanation:
3) Louis pasteur
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