There a a bunch of factual errors in here that should be debunked. Whether or not you donate blood is entirely up to each person, but at least make a decision based on real facts, not myths.-There are indeed many alternatives to blood transfusions (fresh plasma, albumin, hetastarch, lactated ringers, normal saline, and others). BUT- all of them are basically stop-gaps. They are used to rescusitate a person who has lost intravascular volume, be it through bleeding, dehydration, overuse of diuretics, or many other causes. If someone has a problem making red cells (leukemia, myelodysplastic syndrome, toxin exposure, or others) all of those things will do nothing. They do not have problems with the volume of fluid circulating, they need the actual oxygen carrying capacity of red cells, and if they don't get them, they die. -Most people never need a blood transfusion, so swearing them off as a Jehovah's Witness is probably never going to be an issue, but they can and do die from this. In my residency I had several patients who chose to die rather than get a transfusion- I couldn't understand it, but that was their decision.-Paramedics don't give blood because they don't have it on the rigs (you can't just carry it around- it expires quickly), and they don't have the capability to do the testing on it to ensure it is compatible with the patient. They give saline because it is safe and can buy a bit of time before definitive solutions are given.-Lastly, someone else mentioned selling plasma instead. That's a fine source of income, and I did it when I was a broke medical student, but just be aware that goes only to research. Only donated products can be given to patients, as there is too big a risk that people will lie about risky behavior to get their 25 bucks, and end up passing on hepatitis, syphillis, or other infections. The plasma given to patients comes from whole blood donations- plasma is spun off as one product, platelets as another, packed red blood cells as another, etc. So one donation can end up helping several patients. Off for my run, after donating this afternoon. Cheers.