The three Ws — wash your hands, wear a mask and watch your distance — are our best bets for warding off COVID-19 until we have one thing: a vaccine. A vaccine developed by the pharmaceutical company Moderna is currently in Phase 3 clinical trials at UNC-Chapel Hill. Producer Charlie Shelton-Ormond talks with Dr. Cindy Gay, associate professor in the Division of Infectious Diseases at the UNC School of Medicine and primary investigator for that clinical trial , about what exactly is needed for a