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Fast Fact Friday:  Today in 1955, officials announced that the polio vaccine, developed by Dr. Jonas Salk, was a safe and effective preventative measure against what was then one of the deadliest childhood diseases, polio.

Fast Fact Friday: Today in 1955, officials announced that the polio vaccine, developed by Dr. Jonas Salk, was a safe and effective preventative measure against what was then one of the deadliest childhood diseases, polio.