This was an interesting article in the Wall Street Journal.
It appears we still have a long way to go to be able to diagnose Alzheimer's and to treat it.
https://www.wsj.com/health/wellness/why-doctors-cant-agree-on-how-to-diagnose-alzheimers-4b7c7190?st=fDXYvo&reflink=desktopwebshare_permalink
