Regeneron requests emergency use approval for antibody treatment taken by Trump; stock rises 4% in premarket
Regeneron 's stock price rose over 4% in premarket trading Thursday after the company submitted an "emergency use authorization" request to the U.S. Food and Drug Administration for its Covid-19 antibody treatment.

Its REGN-COV2 monoclonal antibody coronavirus therapy is what President Donald Trump took last week after being diagnosed with Covid-19. He has since described it as a "cure" even though there's no such scientific proof.

The biotech company published a statement Wednesday noting that "if an EUA is granted the government has committed to making these doses available to the American people at no cost and would be responsible for their distribution."

The treatment is now available for about 50,000 patients, Regeneron said, "and we expect to have doses available for 300,000 patients in total within the next few months."

REGN-COV2 is a combination of two monoclonal antibodies and was "designed specifically to block infectivity" of the virus that causes Covid-19.

Trump was given an 8 gram dose of the antibody cocktail early in the course of his infection, despite it not being authorized by the FDA.