If you listen to a lot of so called experts in this field they will either tell you it's all perfectly safe, or the honest ones say that no one really knows and it's going to play out for years. That's the problem with trying to bring a vaccine to market in a matter of six months. Normally development is seven to ten years.I guess one would have to define rare and apply a statistical range. My opinion (no medical validation) is the adverse occurrence is somewhere in-between "rare" and "everyone's going to die."
And why regretfully?Several differences between getting jabbed and getting jabbed blood. This is coming from a regretfully jabbed MD here btw. Getting jabbed conscripts your body’s ribosomes by turning you into a GMO, like some Monsanto corn, to get your own body to make the spike protein. Being transfused with the blood of somebody like me should in theory present you only with a temporary load of spike protein, to which I suppose you should make antibodies to. It might actually give you the benefit of conveying an immune response, without the mRNA/adenovirus delivery vehicle/mechanism.
Autologous donation is very difficult to orchestrate, let alone family or relative donations. Also, with autologous, you have to donate well enough in advance of the need that your own erythropoietic system can make up for the donated blood. Otherwise you’re just getting back the blood you recently lost in the first place.
Most hospitals use some third party for blood products (we use blood assurance) and my experience is they are not very receptive to that level of coordination. You more or less get what you get.