There seems to be a common thread being woven through the neurological community regarding brain disorders. That being a viral link. I have read several articles which place the cause of ALS, MS and possibly other neuro maladies at the feet of some unknown virus. Why not? There have been many other diseases whcih at one time baffled researchers, and the culprit turned out to be a virus. Polio is one example. A simple vaccine, and no more polio. In my opinion, this theory should be investigated thoroughly as a possible cause for PD. I'll be the first in line with my newly written prescription for the "Suzman Vaccine".