It's quite probable that body cells will suffer some disruption. However that doesn't necessarily mean they will be killed by it or that they will suffer any long term adverse effects. Body cells are very robust and of course benefit from all of the body's own support mechanisms.
Many researchers who have worked with Rife type machines have been exposed to them for extended periods for many years without suffering any apparent ill-effects. Many of the early researchers from Rife's time who are now dead, died peacefully at very advanced ages - usually they lived longer than average for their generation.
However it must be remembered that because the body is so complex and all the effects of these machines are not yet known, that any Rife treatment should be considered experimental and as such may carry associated health risks.