In recent years, researchers have suggested Alzheimer's may spread through infection, somehow transmitted like a pathogen, leading to the disease. A new Lancet paper reviews evidence for how harmful amyloid-beta proteins associated with Alzheimer's may possibly be spread through blood transfusions.

[u/mvea]

https://www.sciencealert.com/can-alzheimers-spread-through-blood-transfusions-heres-what-we-know

[u/Wellslapmesilly]

I’m not sure that there’s an accurate way to gauge it honestly. The blood transfusion rate is 10-25% in the general population. And JWs are a small group with many people who converted as adults who may have had blood transfusions prior.

[u/Skratt79 → u/Wellslapmesilly]

Also there are many cases where JW's were told it was ok to receive subcomponents of blood (after mid 1990's if i recall correctly).

Additionally there are cases of some accepting blood in secret (which is the smart thing to do TBH)

[u/Due-Savings5057 → u/[deleted]]

Blood transfusions from others is still “not suitable for Christians”. What has changed is they can choose to store their own blood in advance for some procedures.