I think you should double check it and see if you can find the answer if not come back and ask again
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He just wanted to start over is my guess.. I mean he learned from that mistake. That is what life is about, learn from your mistakes and do better in life.
Answer:In 1947, Salk took a position at University of Pittsburgh, where he began conducting research on polio, also known as infantile paralysis. By 1951, Salk had determined that there were three distinct types of polio viruses and was able to develop a "killed virus" vaccine for the disease.
Explanation:
Answer:
which war 1 or 2????? ???
