Silver Pulsers are far more powerful in their job than a zapper. Silver Pulsers as with any good beck blood electrification unit also tend to work a lot quicker on viruses and ailments related to this type of thing. A silver Pulser electrifys the blood or surrounding tissue. A zapper supposedly zaps the entire body except for deep and thick organs. A zapper is very lower power and struggles to do its job if at all sometimes. Stick with the Beck protocol first but if you can add a zapper then do so also.