US President Donald Trump has said he will not wear a face mask despite new medical guidance advising Americans to do so.

Axar.az reports citing foreign media.

He could not see himself greeting "presidents, prime ministers, dictators, kings, queens" in the Oval Office while wearing one, he said.

He stressed that the guidance released on Friday was "voluntary".

"You do not have to do it," he said. "I don't think I'm going to be doing it."

The guidelines issued by the Centers for Disease Control and Prevention, the government's public health advisory agency, came as the US reported more than 1,100 deaths in a single day - the highest total for a 24-hour period anywhere in the world.

The US has so far confirmed 278,458 cases of Covid-19 and more than 7,000 deaths, according to Johns Hopkins University.