The Secretive and Essential Work to Find a Vaccine

The race is on for a Covid-19 vaccine, but behind the scenes there’s a secretive group that has the power to stop a vaccine trial in its tracks. That’s the Data and Safety Monitoring Board, or DSMB, and they’re the only ones who get a look at the data during the trials. CNN’s Chief Medical Correspondent Dr. Sanjay Gupta speaks with Susan Ellenberg about her work with Covid-19 DSMBs. To learn more about how CNN protects listener privacy, visit cnn.com/privacy Learn more about your ad choices. Visit podcastchoices.com/adchoices