If the eyes are not affected, the rays must be relatively safe for human cells in general,
Perhaps the patient's blood could be run thru a dialysis-type machine and be irradiated as it passed thru a field of the correctly modulated UV rays, breaking down the virus on contact.
Determining strength and type of ray as well as length of time on the machine would be in the hands of the research team.
President Trump may have discovered a new direction for the scientists.
ECMO. I dont think it would work, the blood isnt in the machine long enough, it has to be kept moving. As he was saying it I thought of that but the answer is probably no.
This is a respiratory infection, Einstein. Unless youre shoving a lamp into the lower reaches of their lungs, your proposal wouldnt do a damn thing for COVID.