Re: How do Bob Beck and ParaZapper work to kill microbes in blood?

I have been thinking about the voltage and current in a couple ways:

If the zappers kill pathogens in the body what prevents them from killing the body's good cells; would a person have to be careful about frequencies or is this dependent on the amount of current?

Is a 9 volt zapper going to be enough to power two hand held pipes and foot pads? I'm just wondering if there is too much resistance going through the body.

Thanks