Chronic Immune Dysfunction isn't bad, but imho 'chronic' is a bit redundant. Does a person with MS have a chronic illness? yes, but it is just called MS, not CMS. I do think that 'immune dysfunction' should be in there. I would go with 'Idiopathic Immune Dysfunction' (IID) as the all encompassing illness. For those haven't run across the word Idiopathic, it is medical-ese for disease of unknown cause. Anther possibility is just Immune Dysfuncton (ID).