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AB negative

1% of the population

AB negative blood the rarest blood type, and is also in high demand as it is a universal plasma donation. Since the red blood cells contain both A and B antigens, the plasma (liquid portion of the blood) can be given to all patients because these donors do not make anti-A or anti-B antibodies. These donors are encouraged to give platelets or plasma by apheresis, if possible, or whole blood.

What is the rarest blood type?

The rarest blood type is AB negative, which is found in 1% of people.