Today in 1954 the polio vaccine began trails. Polio affected nearly 1.8 million children and on April 12, 1955 the vaccine was officially declared safe and effective. As a result nearly all Americans have been vaccinated for the illness at their time of birth. According to History.com, "In the ensuing decades, polio vaccines would all but wipe out the highly contagious disease in the Western Hemisphere." For this and other facts about today in history please go to http://www.history.com/.
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