blood is only a symbol for life when the source of the blood has been killed
Good point Bobcat
In the transference of blood from one human to another in a medical blood transfusion procedure, the giver of the blood is not dead or had died so the symbolic sacredness of the blood is kept intact.
A perspective to the matter that the WTS heads never probably considered.
Realistically the No Blood doctrine was devised out of personal opinion that should have never have been constituted as a you must do this or you will be disfellowshiped as a JWS