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.
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Betty boop was a big hit back then and one she's such a peach she's a great dancer and her shows just really great
Answer: No, there hasn't been a world war 5? (I think that is what you are asking) Probably none we will all have died off from the previous last 2 world wars.
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