evidence: Zapping is a way of killing bacteria and parasites electrically. I find it kills parasites and bacteria wherever the electricity reaches. But some locations that are not reachable are tooth crevices, the intestinal tract, gallstones, and the inside of tumours. The current is not uniform through the body. In fact, a large fraction may travel along the arteries, veins, lymph vessels, nerves and inflamed regions. Persons with an inflammation in the body can often "feel" the zapper at that location. [...] A first seven-minute zapping session is followed by a 20 to 30 minutes intermission. During this time, bacteria and viruses are released from the dying parasites and start to invade you. Each parasite has its own bacterial and viral escapees. A second seven-minute zapping session is intended to kill these newly released viruses and bacteria. Again viruses are released, this time from the dying bacteria. [...] This type of zapping is frequency "INDEPENDENT", i.e. using 100% positive offset, square wave, the zapper is capable of killing a wide range of parasites, bacteria, viruses without tuning in on every single frequency needed.