In my view, the other one is a joke. They say they can kill it. All they are doing is killing it when it is airborn. Anyone can do that. Is he going to run all the air over a city through that little thing? There is no cure for any virus. Sure you can kill it in the person, but not without killing the person that has it.
Hay man, I got something that can kill any virus in anyone. Just take one pill and virus is gone.
And tell me, kind sir, what is the name of the pill?
Cyanide