Trump said that while he hasn't been exposed to the virus, he was given permission by the White House doctor to take the controversial treatment, and began taking it approximately 10 days ago - right around the time Mike Pence's press secretary, Katie Miller, tested positive for the virus.

"A lot of good things have come out about the hydroxy. A lot of good things have come out. You'd be surprised at how many people are taking it," said Trump.

White House physician Sean Conley said in a memo released by the White House this evening:

"After numerous discussions he and I had regarding the evidence for and against the use of hydroxychloroquine, we concluded the potential benefit from treatment outweighed the relative risks."