President Trump has told supporters that he had "learned a lot about Covid" in the past few days.

"I learnt it by really going to school. This is the real school, this isn’t the let’s-read-the-book school," he said in a message released just before his controversial drive-by outside the Walter Reed Medical Center, where he is being treated

"And I get it, and I understand it. And it’s a very interesting thing and I’m going to be letting you know all about it.
"In the meantime we love the US and we love what’s happening."