The White House has defended the president’s top coronavirus adviser, Dr Anthony Fauci, amid scrutiny of his recently released work emails.
Dr Fauci has been the face of the nation’s Covid-19 response, drawing both praise and criticism.
“I’m very confident in Dr Fauci,” President Joe Biden said on Friday.
But emails have raised questions on whether he backed Chinese denials of the theory that Covid-19 leaked from a lab in Wuhan.
A trove of Dr Fauci’s emails covering the onset of the coronavirus outbreak were released this week to media under a freedom of information request.