April 12 1955 – The Polio Vaccine is Declared Safe and Effective

April 12 1955 – The Polio Vaccine is Declared Safe and Effective5 (100%) 1 vote *Image Credit: Wikimedia Commons In the history of mankind, few diseases have caused more damage in the lives of young children than poliomyelitis. The crippling condition, caused by a virus entering the central nervous system, finally met its match when Jonas Salk received approval for a vaccine on April 12, 1955. In the decades since, worldwide cases have been to reduced to a microscopic percentage compared to the numbers experienced in the first half of the 20th century. Polio is a highly infectious disease that, for the most part, results in no symptoms whatsoever — […]