Polio Back in the U.S.?
Polio was an epidemic in America in the 1950’s. Nearly 60,000 cases with more than 3,000 deaths were reported in the United States at the
November 4, 2010
Polio was an epidemic in America in the 1950’s. Nearly 60,000 cases with more than 3,000 deaths were reported in the United States at the