Key points from article :
1. Better idea of what tau proteins look like
2. Bacteria seem to be playing some kind of role
3. Blood test could spot the condition decades ahead
4. Memories aren't erased and could be accessed again
5. Ultrasound could breach blood–brain barrier
6. Beta amyloid can move from other parts of the body
7. Diabetes drug could also be used to treat Alzheimer's
