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Dr. Jonas Salk created a vaccine for poliomytis or Polio. In 1954, Salk had done the biggest field trial ever recored in history. He did this experiment on over 1.8 million people. There was 2 vaccines. One was the vaccine that he has created and then the Placebo. Then he had a control group. He died on June 23, 1995. He was 80 years old when he died

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16y ago

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