President Trump leaves the White House for Walter Reed National Military Medical Center on October 2. | Saul Loeb/AFP via Getty Images

Trump was given an unproven antibody therapy from Regeneron after testing positive for the coronavirus.

President Donald Trump has received an unproven antibody treatment for Covid-19 following a test confirming that he was infected with the SARS-CoV-2 virus, White House physician Sean Conley said in a letter Friday afternoon.

The treatment was developed by the biotech company Regeneron. “Following PCR confirmation of the president’s diagnosis, as a precautionary measure he received a single 8 gram dose of Regeneron’s polyclonal antibody cocktail,” Conley wrote.

An update from President @realDonaldTrump‘s physician: pic.twitter.com/cTsXO4Df6b

— Kayleigh McEnany (@PressSec) October 2, 2020

Later in the day, Trump flew to Walter Reed Medical Center, just outside Washington, DC, where officials say he will stay