President Trump took the old saying that "sunlight is the best disinfectant" to a whole new level at Thursday's briefing. He had William Bryan, the science and technology adviser to the secretary of the Department of Homeland Security, give a presentation about admittedly "emerging" results that the spread of coronavirus could slow with direct sunlight and humidity.

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Here's what the president said:

Supposing we hit the body with a tremendous whether it's ultraviolet or very powerful light. And I think you said that hasn't been checked, but you're going to test it. And then I said supposing you brought the light inside the body, which you could do either through the skin or in some other way, and I think you said you were going to test that, too. Sounds interesting.

And then I see the disinfectant, where it knocks it out in a minute, one minute, and is there a way we can do something like that, by injection inside or almost a cleaning, because you see it gets in the lungs, and it does a tremendous number on the lungs, so it'd be interesting to check that, so that you're going to have to use medical doctors with, but it sounds — it sounds interesting to me. So we'll see, but the whole concept of the light, the way it goes, the way it kills it in one minute, that's, uh, that's pretty powerful.

He went on to ask Dr. Deborah Birx, response coordinator of the coronavirus task force, if she'd heard of using "the heat and the light" to treat coronavirus.

"Not as a treatment," she responded.