There is nothing in Jewish law that would preclude a person from benefiting from a blood transfusion (or donating blood, for that matter).
Furthermore, according to Jewish belief, saving a life is one of the most important mitzvot (commandments), overriding nearly all of the others. (The exceptions are murder, certain sexual offenses, and idol-worship—we cannot transgress these even to save a life.) Therefore, if a blood transfusion is deemed medically necessary, then it is not only permissible but obligatory.
All the best,
Rochel Chein for Chabad.org
After re-reading Rochel Chein's comment above, could I encourage you to give blood for the bloodbank? Whatever society you are in, there are people who require an infusion. If you feel uncomfortable simply placing you blood in the common pool, ask at your collection centre if they will accept your contribution on a Jewish preferential basis.
I was a blood donor for 52 years and thank G-d that, over that time, He gave me the health and strength to supply enough blood to fill 14 people.