Dr. William Schaffner on Coronavirus Vaccine Trials

Chris discusses the latest coronavirus developments with Infectious Disease Specialist, Dr. William Schaffner, the uncertain future of professional sports seasons with CNN contributor, Bob Costas, and honors the life and legacy of Representative John Lewis.  To learn more about how CNN protects listener privacy, visit cnn.com/privacy Learn more about your ad choices. Visit podcastchoices.com/adchoices