The key is to lower immune response, without it a disease does not exist for the white coats. IMO the most telling example is BioW Lyme Disease and the quote from Klinghardt's early work:
"To use conventional diagnostic tests such as the Western Blot, one has to think in paradoxes: the patient has to be treated with an effective treatment modality first before the patient recovers enough to produce the antibodies, which then are looked for in the test."
-- Dr. Klinghardt, Lyme Disease a Look beyond Antibiotics