McEnany said she tested positive on Monday, a day after she informally briefed reporters outside the West Wing.
“After testing negative consistently, including every day since Thursday, I tested positive for COVID-19 on Monday morning while experiencing no symptoms,” McEnany posted to Twitter.
"As an essential worker, I have worked diligently to provide needed information to the American People at this time," she wrote. "With my recent positive test, I will begin the quarantine process and will continue working on behalf of the American People remotely.”
The announcement comes days after Trump himself announced Friday that he tested positive. Hours later he was moved to Walter Reed Medical Center, where he continues to be evaluated. First lady Melania Trump also announced she tested positive.
Shortly after McEnany announced her positive test, sources with knowledge of the health status of White House aides who spoke on the condition of anonymity said that press office officials Karoline Leavitt and Chad Gilmartin had also tested positive.
McEnany was among several officials who attended a ceremony in the Rose Garden at the White House late last month when Trump introduced Judge Amy Coney Barrett as his nominee to the Supreme Court. That was a common event for many of those in the administration or Congress who later tested positive.