Donald Trump is no longer a transmission risk for COVID-19, his doctor said late on Saturday, as the U.S. president seeks to put his bout with coronavirus behind him and return to the campaign fray.

Trump, trailing his Democratic challenger Joe Biden in opinion polls, addressed supporters from a White House balcony on Saturday afternoon. He urged a crowd of hundreds of largely Black and Latino supporters to help get out the vote in the Nov. 3 election.

His physician Sean Conley said in a statement later that Trump had taken a test on Saturday showing he was no longer "a transmission risk to others," and there was no longer evidence "of actively replicating virus."