Alzheimer's is not the fault of the patient

There are so many people who have done everything "right" and still get Alzheimer's (Reagan comes to mind) that I doubt much can be done to prevent it if it is in the cards.  That doesn't mean one shouldn't be active, both mentally and physically, but those who are unlucky here are not to blame for it.  I suppose maybe a small percent of cases can be prevented, but it will take medical interventions we now do not have to make a major dent.  That of course is no reason not to do all those things -- they help in all sorts of ways.