Democratic presidential candidate Joe Biden said on Tuesday that next week's scheduled debate with Republican President Donald Trump should not take place if Trump is still infected with Covid-19.

Biden said the Oct 15 debate in Miami should only be staged under strict health guidelines and called the coronavirus outbreak that has hit Trump and a wave of other White House officials "a very serious problem."

"If he still has Covid, we shouldn’t have a debate," Biden told reporters after a campaign stop in Pennsylvania.

"I’m not sure what President Trump is all about now. I don’t know what his status is. I’m looking forward to being able to debate him, but I just hope all...