FYI, I am not new to Rife or his machines, although, I have not built one or bought one. I am considering either option at the current time.
I talked with the maker of one machine the other day. He told me that at 5000 Hz, that the machines could actually kill red blood cells...but made the caveat that the red blood cells destroyed were probably malformed or on their way out (about to die) anyway. So, his take was that a healthy cell would not be destroyed, but an unhealthy human cell could be destroyed. I don't know what the carrier frequency was in this particular case.
So, you have to ask yourself....will it kill a healthy virus, bacteria, or mold organisms/cells, etc. My GUESS is that power is the important thing. Rife used much higher power devices than most sold commercially today, therefore, less they are less effective, therefore, at low power normal human cells would have no reaction to any frequency.
Leroy
P.S. I've seen the videos from Rife, John Bedini, etc. I know it will kill stuff...but were they healthy to begin with? My GUESS is that the power in the devices sold commercially today is too low to do any harm to "normal" human cells, but may also be ineffective against "normal" bad guys too (although I do not know why a herx reaction would occur in this case if the power is too low).