No, but there is proof and even a patent for killing virus in the blood.
Yes, it is similar to some of the so called "quack medical devices" of the late 1800's to about 1936 when the AMA realized that electro-therapy was not as profitable as drugs. They do everything that they can to discourage the use of these although they are basically harmless when used correctly. See: http://medical-electric-battery.com/
for more information on these antiques.
I own several and they actually do work for some things.