Regeneron Announces Encouraging Initial Data from COVID-19 Antibody Cocktail Trial in Hospitalized Patients on Low-flow Oxygen Just published today. DECEMBER 29, 2020 https://www.prnewswire.com/news-releases/regeneron-announces-encouraging-initial-data-from-covid-19-antibody-cocktail-trial-in-hospitalized-patients-on-low-flow-oxygen-301199163.html This is the medication US president took during his brief hospital stay.