Believe it or not, we worldly people worry about blood too...not in the same way JW do, but there is always a concern. I am in a medical field, so I have known the pros/cons of blood for a long time.
Blood is a life saver, not a convenience. Would I accept blood just to raise my moderately low hemoglobin instead of taking iron supplements? No, of course not, that would be medically irresponsible.
Would I accept blood for myself or my family to save a life? You bet I would!!!!! The proven benefit (life) is more than balanced by any possible risk (possible future health problems).
All of the physicians that I know, and whose judgment and skill I trust, are extremely conservative about using blood, and I know if they prescribe it, there is a definite medical necessity for its use.
concerned mama