I am not a paid subscriber of Cheneyresearch.com anymore, but this blurb was available from the public page: http://www.cheneyresearch.com/category/subscribers "It is my sense that infectious RV’s and possibly Herpes Group viruses are universal “test” agents for cells they infect to see if they can buffer their redox state in the case of either an externally induced redox shift to a more oxidizing environment or internally produced by the viruses themselves as they have the machinery to do it. If they can overwhelm the redox buffer, they replicate rapidly and kill the cells which lytically explode releasing virions to try again in other cells. If you cannot control the redox buffer systemically, you die because such loss of buffer threatens the DNA and the species with it. Therefore, these endogenous viruses are the wolves culling out the weak sheep in the flock of humans who in turn face external environmental challenges that threaten their redox balance. By this method, these endogenous viruses and especially RV’s direct human evolution to some unknown end but they only allow the subset of humans who can properly defend their redox state to survive or procreate." My question is: If this is an evolutionary weed-out process, why is CFS not a fatal disease in vast majority of cases?