BG you are so right on about the necessity of the current to "ring" (alternate in polarity). Here is the research to prove you are right: http://www.dragonfly75.com/eng/OMFresearch.html The Beck magnetic pulser is very good though at moving stagnant lymph. Lymph fluid is the transport system for newly created white blood cells from the bone marrow to the bloodstream so it does help the immune system but does not directly kill microbes.