A person familiar with Mr Trump’s condition told the Associated Press that he was given oxygen at the White House, after the president’s doctor sidestepped the question at a press briefing on Saturday.
Navy commander Dr Sean Conley, speaking at a press conference, said Mr Trump was not administered oxygen on Thursday or since he has been a patient at Walter Reed Medical Centre.
White House doctors said the president began exhibiting “clinical indications” of Covid-19 on Thursday afternoon, earlier than previously known.
They said he was doing very well and his symptoms were improving.
However, the person said the president’s condition had been “very concerning” but Mr Trump has been improving since going to hospital.
First Lady Melania Trump has also tested positive for Covid-19 and is recovering at home.
Mr Trump praised the medical staff, saying that with their help he was “feeling well”.
He tweeted: “Doctors, Nurses and ALL at the GREAT Walter Reed Medical Center, and others from likewise incredible institutions who have joined them, are AMAZING!!!Tremendous progress has been made over the last 6 months in fighting this PLAGUE. With their help, I am feeling well!”
At the press briefing, the president’s doctor said Mr Trump is doing well, is fever-free and is not having difficulty breathing.
Dr Conley said while he had fatigue, nasal congestion and coughing, the president’s symptoms are resolving and improving.
He said Mr Trump had not been on oxygen on Saturday or when he was with their medical team on Friday.
Dr Conley added that the president said he felt he could walk out of the military hospital.
The medic said the typical range of monitoring is seven to 10 days.
