Regeneron's treatment belongs to a class of drug called monoclonal antibodies. Fauci said that while these had been "showing promise in clinical trials", the research is still ongoing and no final determination has been made.
Fauci was also asked about the low level of mask use at the White House until recently, and what lessons could be learned.
"I think the — the data speaks for themselves," the scientist said of mask-wearing.
"We had a super-spreader event in the White House and it was in a situation where people were crowded together and were not wearing masks. So the data speak for themselves."
More than 30 people are thought to have been infected at a White House ceremony held September 26 for the nomination of Amy Coney Barrett to the Supreme Court.
Read also: Amy Coney Barrett to Face Tough Second Day of Supreme Court Hearing
The president's doctor Sean Conley has said Trump may return to public engagements as early as Saturday, raising fears that he may still have high levels of the virus in his body and therefore still be contagious.
Fauci said he had faith that the president's medical team wouldn't allow him to do that.
"I can tell you, they are going to be testing him to determine the trajectory and whether he gets to the point where he's not infected," he said. "I can guarantee you that they will be testing him before they let him go out."
(Writer: NL/ACH, IA/BFM, Agence France-Presse)
Source: http://u.afp.com/3rXb
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