Anecdotally, I am aware that many in my family who developed alzheimer's (it runs on both side of my family) has surgery a few years before the disease started to present itself. Though the likelihood of there being much of a connection seems far fetched, even with this latest evidence, I have suddenly become much more concerned about going under the knife until this is all worked out. The grafts I get, but that proteins lingering on equipment, which isn't ordinarily removed through standard sterilization, could be a means of transmission... scary.