Rh Negative Bloodlines in History - ROBERT SEPEHR

First published at 18:40 UTC on January 10th, 2019.

Each person’s blood is one of four major types: A, B, AB, or O. Blood types are determined by the types of antigens on the blood cells. Antigens are proteins on the surface of blood cells that can cause a response from the immune system. The Rh fact…

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