Human Anatomy, Physiology, and Medicine. Anything human!
I know this is a very old post and this response may never be read, but I have to comment. Group O red cells are frequently used for people of all blood types. Group O blood does contain Anti-A and Anti-B. The key here is to realize that there is a difference of product between "blood" and "red cells". Whole blood which contains the plasma portion is rarely used today. Most blood centers do not collect whole blood. The best use of blood is seen in component therapy. Whole blood is usually processed into plasma and red cells, possibly platelets. That way the physician can treat the patient with the component that is actually needed. Red cells are used to treat anemia, plasma is used to treat clotting disorders and platelets are used for bleeding /clotting disorders. A large volume blood loss is best treated with a mix or red cells, plasma, and platelets to approximate whole blood.
When Group O red cells are used, most of the Anti-A and Anti-B in the plasma has been removed. What remains is negligible and does not cause harm to the patient.
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