Viruses are not bacteria
And as I'm inclined to think, they can be killed with ultraviolet and ozone. That's essentially one of the reasons why open places with a lot of sunshine are relatively safe. Regardless, this is a kind of field hospital where everyone is considered infected. They could run tests before admission, and even if some people free of coronavirus get admitted by mistake, this won't make things particularly worse than they would be without these hospitals
I am not that knowledgeable about this, but as far as I know both ultraviolet and ozone are harmful to the human body. I have heard about ultraviolet rays being used to sterilize rooms or even entire buildings, but usually that is done when no one is inside. And I don't know whether sunshine is having any detrimental effect on COVID 19. If that was the case, then the situation in Florida could have been much better.