CBS Sunday Morning Correspondent Rita Braver interviews Dr. Paul Duprex, Jonas Salk Chair, and Director of the Center for Vaccine Research and “The Shot Felt Round The World” producer Carl Kurlander on the parallels of the fights against the polio virus and the coronavirus.  CBS Sunday Morning’s How The Fight Against https://www.cbsnews.com/news/how-the-fight-against-polio-was-won/ Was Won