Here's my story: I had a neighbor kid in Paraguay with ascaris lumbricoides (worms) and I tried curing him with pad-type Rife device but failed miserably. The I heard that the EMEM2 was great against parasites and so built one. Using it on the 12 yr old boy for 2-3 times each week for 3 weeks completely cured him. So then I started selling it as my Anti-Parasite Zapper. It's main advantage over these weak Rife and Clark Zappers is that it also puts out strong electrical current (level-controlled by user) which I believe is essential for killing parasites. The others don't.