Posted on February 22, 2014April 2, 2017 by Shirley HartungThank you, Canada! How did Canada help Dr. Salk and his team with the production of the polio vaccine? Find the answer in the Activity Book. Look for the Canadian flag! Related postsComparing the Polio Virus with the Coronavirus continued...Bill Gate's Warning in 2015The Forgotten OnesNecessity is the Mother of InventionA Feeling of Deja-vuShare this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Like this:Like Loading... Related
