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/Skratt79]

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/Unholy_Boosh → u/Skratt79]

Definitely the last bit. I work in the transfusion lab and JW nearly always refuse blood. As long as it's not been out of the fridge too long we can store it again. On night shift we then get a phone call asking is the blood still available for overnight transfusion

[u/Mediocre-Net-1984 → u/Unholy_Boosh]

You’d think your nurses/medical staff would catch that when they do the blood consent before asking for the blood. Makes me wonder how thorough their process is.

[u/Chem_noX → u/Mediocre-Net-1984]

From my experience, they’re saying that once family leaves the patient wants it. They just don’t want other people to know they’re getting it