Looks like Trump's proposed "UV radiation inside body" treatment isn't as alien as... for example Vampires are.
US gov publishes article on how UV was used in the 40s and 50s and it did work.
Ultraviolet Irradiation of Blood: “The Cure That Time Forgot”?
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6122858/