Trump was scheduled to hold a “Make America Great Again” event at Orlando Sanford International Airport in Sanford, just outside Orlando.
That rally, which would have been outdoors, has been removed from Trump’s official schedule.
COVID-19 is a disease caused by the CCP (Chinese Communist Party) virus.
Alvina Chu, epidemiology program manager for the Orange County, Florida Health Department, told reporters at a press conference on Thursday that so-called super spreader events, or events with a high rate of CCP virus spread, all have the same characteristics, including having a large number of people, having people without masks, and having people not washing their hands.
The White House also axed a roundtable with supporters at Trump International Hotel in Washington.
Washington Mayor Muriel Bowser, a Democrat, early Friday urged people to visit free COVID-19 testing sites to get tested and stay home while they waited for results.
Anyone with symptoms of the new disease, which include fever and chills, should stay home, she said.
The third activity on Trump’s schedule remains in place: a phone call on COVID-19 support to vulnerable seniors.
Trump also had rallies planned in Tuscon and Flagstaff in Arizona for Oct. 5. Those will likely not be held.
Federal health guidance calls for people who test positive for COVID-19 to isolate themselves for 14 days.
The CCP virus incubation period can last that long, according to the Centers for Disease Control and Prevention, which also says patients without symptoms can spread the illness.
Trump, 74, said on Twitter that he and First Lady Melania Trump, 50, who also tested positive, would quarantine at the White House “immediately.”
The first lady said she and her husband “are feeling good.”
“I have postponed all upcoming engagements,” she said in a statement, adding, “Please be sure you are staying safe & we will all get through this together.”
The source of the infections isn’t confirmed but White House aide Hope Hicks tested positive for COVID-19 this week, Trump confirmed late Thursday.
Hicks, 31, frequently travels with the president.