US President Donald Trump’s 14-year-old son Barron contracted coronavirus but has since tested negative, First Lady Melania Trump revealed.
Mrs Trump said her “fear came true” when Barron tested positive for Covid-19.
But, she said, “luckily he is a strong teenager and exhibited no symptoms.”
Both the president and first lady also tested positive for coronavirus – as well as other White House staff – but have since recovered.
Before leaving for an Iowa campaign event on Wednesday, Mr Trump told reporters at the White House that his youngest son was doing “fine”.
An event at the White House on 26 September, for the unveiling of Mr Trump’s Supreme Court nominee Amy Coney Barrett, is thought to be the root of the localised outbreak.
The White House press secretary, former Trump counsellor Kellyanne Conway and two senators were among the people around the president who tested positive for the virus. On 2 October, hours after the first couple announced they had tested positive, Mrs Trump’s chief of staff Stephanie Grisham told US media that Barron had tested negative.
The US has recorded more than 7.8 million coronavirus cases and 216,000 deaths, according to data collated by Johns Hopkins University.
Mrs Trump revealed Barron’s positive test result in an essay entitled “My Personal Experience with Covid-19”, published on the White House website.
After she and the president received their positive results two weeks ago, she said “naturally, my mind went immediately to our son.”
Mrs Trump said it was a “great relief” when Barron initially tested negative, but was concerned he would later test positive for the virus. “My fear came true when he was tested again and it came up positive,” she said, adding that Barron exhibited no symptoms.
“In one way I was glad the three of us went through this at the same time so we could take care of one another and spend time together,” she wrote.
The first lady also reflected on her own diagnosis. She said she experienced a “roller coaster of symptoms”, including body aches, a cough and fatigue.
“I chose to go a more natural route in terms of medicine, opting more for vitamins and healthy food,” she wrote.
In her statement, Mrs Trump also said the “most impactful part” of her recovery was “the opportunity to reflect on many things – family, friendships, my work, and staying true to who you are”.
Mrs Trump said she would be resuming her duties as soon as she could.
media captionTrump holds rally: “I’ll just give you a big, fat kiss”
While Mrs Trump remained in the White House, President Trump spent three days at Maryland’s Walter Reed National Military Medical Center after his own Covid-19 diagnosis. He received a number of different drug treatments, including dexamethasone, a steroid, antiviral treatment remdesivir and monoclonal antibody therapy.
He returned to the campaign trail on Monday, telling supporters he felt “powerful”.
His personal doctor said on Sunday that he was no longer a Covid transmission risk to others.
There are only weeks to go before the 3 November US presidential election.