Trump's explanations shifting again. Yesterday, he said he was speaking to reporters.
Thankfully, there's a transcript:
TRUMP: "Deborah, have you ever heard of that? The heat and the light, relative to certain viruses, yes, but relative to this virus?"
BIRX: "Not as a treatment" https://t.co/U0O0BX9639

— Jeremy Diamond (@JDiamond1) April 25, 2020