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People with type ab blood are considered the "universal recipient" for transfusions because their blood is plentiful in a and b antibodies. they are usually rh negative. their blood lacks a or b antibodies. their blood cells lack a and b antigens. they usually have very strong immune systems.

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The correct answer is their blood lacks A or B antibodies.

People with type AB blood have A and B antigenes on the surface of red blood cells (RBCs). Antigen AB  has no antibodies, thus, transfusion can be considered safe ( the serum of the recipient does not contain antibodies for the blood cell antigens of the donor).


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