God prohibited the eating of blood. In Genesis, Leviticus and Deuteronomy the edict is clear: "Do not eat blood !" When the Apostles said "abstain from blood," Jewish Christians must have contextually understood that to mean "do not eat blood."
For Jehovah's Witnesses "abstain from blood" means blood should not be transfused. They illustrate: “If a doctor were to tell you to abstain from alcohol, would that simply mean that you should not take it through your mouth but that you could transfuse it directly into your veins? Of course not! So, too, ‘abstaining from blood’ means not taking it into your body at all.” - Live forever on a paradise earth. Ch. 25. p.216 par. 22.
Eating blood cannot be the same as transfusing blood in the same way that eating a kidney can not be the same as a transplantation. The former is a digestive or "destructive" process while the latter leads to a constructive process involving the compatible allograft performing its normal constructive function.
We can abstain from alcohol, but we can not abstain from blood in the way that Jehovah's witnesses want us to understand the phrase "abstain from blood." We need compatible blood regardless of its source.cWhen the body fails in its hemopoietic function, the prudent thing to do is accept a transfusion if deemed therapeutic.