For now, I accept the notions that Wegs and other AI diseases are triggered by something, either in the environment or something biological like an infection, and that there is more than one thing, or type of thing, that could serve as the trigger. I think it's plausible that some people are more susceptible to this triggering reaction than others, whether for hereditary or other reasons. When the disease occurs in "clusters" in certain geographical areas, I tend to believe there is something in that area that is triggering it, and not just that the docs there are inexperienced. After all, most docs everywhere are inexperienced with Wegs. But then what do I know? Nothing, really.