If you base your premise on the belief that the medical 'industry' isn't in fact based on parasites and the pathogens they're infected with, then, indeed a zapper and de parasite herbs might not help. Which by your premise would be right.
Since I have twenty years of success and a return to pretty much full health, addressing the parasite issue, and then herbs for the various infections that come in on the parasites ONLY, I don't even get a cold any more. So I believe my premise over yours, based on my life experience. Care to share your reasons for believing YOUR premise?