I was happy to know what was causing my illness. I just don't I have any viruses in addition. Since I've had joint pain for the past 5 years I was diagnosed with fibromyalgia (I had various diagnoses before that as well). That seemed to go over better with people, but it still doesn't explain why. And after some research, it seems the symptom list for CFS, ME, and fibromyalgia are almost identical. We still don't know exactly what's going on with everyone and why different illnesses cause the same symptoms.