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Rewind: Historic Vaccines -- The End of Polio and Smallpox

The Bowery Boys: New York City History

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The Influence of the Vaccines on Polio

In 19 54, a field trial using two million children was conducted in the United States. The following year, it was announced that the vaccine had proven to be safe and 90% effective against polio. But because they were rushing it to market, there were serious mistakes made. It caused 56 deaths, but then sparked all these new epidemics across the country. So jona sacks vaccime was eventually phased out,. There are even debates to day about which vaccine is most effective and safe.

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