I could have sword he was dropping hints at UVBI during that particular press conference. It's very interesting what we can do with UV light. What's even more interesting is how long ago it was discovered. "Orange man bad" and tanning beds might've been a clue, too.

https://pubmed.ncbi.nlm.nih.gov/26092299/

The treatment of infectious disease with a medical device: results of a clinical trial of ultraviolet blood irradiation (UVBI) in patients with hepatitis C infection

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6122858/

Ultraviolet Irradiation of Blood: “The Cure That Time Forgot”?