polio vaccine

Death knells are beginning to ring for poliovirus. The CDC reports that, in 2014, there were 359 new cases of wild poliovirus in nine countries. Just one year later, the number of new cases dropped to 74, a nearly 80% reduction.
On February 23, 1954 the first mass trials of the Salk Polio Vaccine began in Pittsburgh. The results, evaluated over the next year, showed how remarkably safe and effective it was, eventually relegating the much-feared scourge of polio into the dustbin of history, at least in America.
This past Sunday, April 12th, marked the 60th anniversary of Jonas Salk s polio vaccine being deemed safe, effective and potent after the largest clinical trial for a vaccine in history. The inactivated polio vaccine was licensed by the federal