I’ve been a blood donor for most of my adult life, and have donated about 30 liters. Where I’m at you get a token donation and a thanks for donating, but someone mentioned that in the US you get paid quite a lot depending on the quality and the blood type.
I have a fairly uncommon blood type (about 10% of the population) and a blood count of around 150.
So, how wealthy would I have been if I had donated my blood in the US instead?
the problem is that blood can be check only so thoroughly - some illnesses only develop much later and can only be tested for then, especially on a large scale. That’s why in most countries the first donation is not actually used for anything besides testing.
Anyway, plasmapheresis/apheresis has the risk of a reaction to the sodium citrate that is used as a anticoagulant - there are systems that use no sodium citrate but they increase the risk for embolisms. Sodium citrate can cause hypocalcaemia, seizures,hypertention and a few more things,but generally it’s safe in the donor setting.