Donald Trump's doctor said the US president is 'doing very well' after being taken to a military hospital with coronavirus.
The White House says the US President - whose wife Melania has also tested positive - is being hospitalised for the next few days 'out of an abundance of caution'.
74-year-old Mr Trump, who is said to have mild symptoms of the virus, has been given a dose of Remdesivir - a drug which was developed to treat ebola.
He has also been given an experimental antibody cocktail of drugs produced by Regeneron.
In the video filmed before he departed the White House, Mr Trump said: "I want to thank everybody for the tremendous support. I'm going to Walter Reed hospital.
"I think I'm doing very well but we're going to make sure that things work out, the First Lady is doing very well, so thank you very much I appreciate it, I will never forget it."
— Donald J. Trump (@realDonaldTrump) October 2, 2020
In a later update, he insisted it was "going well, I think".
Melania Trump, meanwhile, is said to have only a mild cough and headache after testing positive.
More positive tests
Donald Trump's hospitalisation comes as several of his allies tested positive for the virus.
It was confirmed before Mr Trump's own diagnosis that his senior aide Hope Hicks had contracted the virus.
US media reported that Mr Trump's campaign manager Bill Stepien has tested positive and has mild symptoms of the virus.
The US president's former advisor Kellyanne Conway tweeted overnight that she also has the virus.
Tonight I tested positive for COVID-19. My symptoms are mild (light cough) and I’m feeling fine. I have begun a quarantine process in consultation with physicians.
As always, my heart is with everyone affected by this global pandemic. ❤️
— Kellyanne Conway (@KellyannePolls) October 3, 2020
Republican senators Mike Lee and Thom Tillis also confirmed they have tested positive.
Ms Conway and the two senators were among several attendees at an outdoor event at the White House last weekend, where Mr Trump introduced his Supreme Court nominee Amy Coney Barrett.
Ms Coney Barrett has not tested positive.
Former CNN correspondent Gina London told Newstalk Breakfast that there's a major test and tracing effort needed to find those who've been in close contact with the US president.
She said: "He's had seven events in the five days before he was diagnosed... three of them were large rallies.
"To track and trace and test the people he's been in contact with, while the White House still does not have a mandate on wearing masks inside, is counter-intuitive to what's happening right now.
"There's so much to think about in terms of politics, the election, and the Supreme Court nomination process."
Democratic presidential candidate Joe Biden yesterday confirmed he and his wife Jill have tested negative for COVID-19.
Mr Trump's diagnosis came only two days after the first presidential debate between himself and Mr Biden.
Main image: US President Donald Trump exits Marine One while arriving to Walter Reed National Military Medical Center. Picture by: Oliver Contreras/DPA/PA Images.