Meet Gary I Kleiner, MD, leading the Regeneron trial, which will be used as a prophylaxis to prevent the spread of COVID: Oct. 7, 2PM EDT October 6, 2020 sarah JonasExpert Pitch Post Views: 314 Meet Gary I Kleiner, MD, leading the Regeneron trial, which will be used as a prophylaxis to prevent the spread of COVID: Oct. 7, 2PM EDT