Donald Trump's Press Secretary has tested positive for coronavirus.
Kayleigh McEnany gave a short briefing to journalists outside the White House yesterday - without wearing a mask.
Ms McEnany insisted she had consistently tested negative since the President's positive tests on Thursday evening.
It's possible for a patient to test negative for several days after contracting Covid-19 - and they can be infectious without having symptoms.
In a statement, Ms McEnany said: "After testing negative consistently, including every day since Thursday, I tested positive for Covid-19 on Monday morning while experiencing no symptoms.
"No reporters, producers or members of the press are listed as close contacts by the White House Medical Unit."
She also insisted she had no knowledge of senior aide Hope Hicks' positive test result when she gave a White House Press Briefing on Thursday.
She said: "Moreover I definitively had no knowledge of Hope Hicks' diagnosis prior to holding a White House press briefing on Thursday.
"As an essential worker, I have worked diligently to provide needed information to the American People at this time.
"With my recent positive test I will begin the quarantine process and will continue working on behalf of the American People remotely."
Over the weekend, President Trump was accused of putting people's lives at risk during a car trip from hospital to wave to fans.
The US President briefly left Walter Reed National Military Medical Center in Bethesda, Maryland, where he is being treated, in a motorcade on Sunday.
He was captured on video waving to cheering crowds while wearing a mask, despite virus patients generally required to quarantine for 14 days to avoid infecting others.
Trump tested positive on Thursday - two days after his first presidential debate with Democratic rival Joe Biden - and did not disclose his infection until the early hours of Friday morning.
