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What is the rarest blood group on the earth?

April 26, 2017blood Chemistry earth group Mathematics rarest

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What is the rarest blood group on the earth?

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AB negative is the rarest but, from the point of view of blood transfusions, type O can only receive blood from type O donors. All other types can receive their own type and O. So, group O is most in demand for blood transfusions and, therefore, the rarest for blood transfusions.