While I am not sure about the so called " Hulda Clark Zapper Digital Deluxe", I do know that regular Hulda Clark Zappers do not kill T-cells because I have done extensive testing with regular zappers and especially ParaZapper, including direct observation of blood while it was being zapped.
Actually, among single cell organisms, including the bodies immune cells, amoebic forms are the least susceptible forms. This is because they do not maintain a constant cell structure.
So, I do not know where your N.D. got this information from, but it needs to be re-examined. I have never seen any credible scientific data to support her claim and it is certainly not what I have seen.