Drug companies release a joint statement saying science will guide vaccine trials

CNN’s John King speaks Carlos Del Rio, the executive associate dean at the Emory University School of Medicine, about the efficacy of a coronavirus vaccine and whether President Trump is being too optimistic in claiming a vaccine could be ready as soon as next month.”

CNN’s John King speaks Carlos Del Rio, the executive associate dean at the Emory University School of Medicine, about the efficacy of a coronavirus vaccine and whether President Trump is being too optimistic in claiming a vaccine could be ready as soon as next month.”