Tonight: Scientists seek to use antibodies in the blood of people who have recovered from coronravirus to treat new patients or as the basis for a vaccine. Dr. Pete Hotez, Co-Director of the Texas Children’s Hospital Center for Vaccine Development, weighs in. Then, Governor Ned Lamont of Connecticut on the ventilator market amid the coronavirus pandemic: “It’s like surge pricing on Uber—only at the last minute the car drives away.”