Ms Hicks said she experienced minor symptoms after the rally and was isolated in another part of Air Force One for the flight back to Washington.
Back at Joint Base Andrews, she disembarked from a separate exit at the back of the plane. Shortly after, on Wednesday night, Mr. Trump was seen returning to the White House on Marine One looking tired. He reportedly fell asleep on the plane, which is usually a time he tweets.
Ms Hicks’ diagnosis was definitively confirmed Thursday morning. Questions were raised as to why it took so long. A more precise and longer test may have been used.
The result was limited to a very small circle. Kayleigh McEnany, Mr. Trump’s press secretary, was unaware when she held a press briefing at 11 a.m. on Thursday.
However, Mr Trump decided to visit his Bedminster, New Jersey, golf club again Thursday afternoon for a meeting with donors.
Ms. McEnany and Mr. Scavino were to travel with him. Just before Marine One took off, Ms Hicks’ diagnosis was made and they were told not to go because they had been in contact with her.
The President’s event at Bedminster was closed to the press. It would have brought together up to 100 people. It was not known if he was wearing a mask.
According to some reports, he appeared “lethargic” and exhibited cold-like symptoms. Meanwhile, news of Ms Hicks’ diagnosis began to filter through other White House officials, but no public announcement was made.
The news did not become public until 8:09 p.m. Thursday, when it was tweeted by Jennifer Jacobs, Bloomberg’s senior correspondent in the White House.
About an hour later, at 9 p.m., Mr. Trump conducted a televised telephone interview with Fox News host Sean Hannity.
He said, “I just went out for a test. He’ll be back later I guess, and the First Lady too, because we spend a lot of time with Hope. ”
Mr Trump suggested that Ms Hicks may have contracted the virus from hugging members of the military and law enforcement.
He said, “He’s a very warm person to them. She knows there is a risk, but she is young. “