Golden Blood

One of the rarest blood types in the world is Rhnull, also called "golden blood". People with this blood type do not have the Rh antigen at all. First discovered in Australian Aborigines, this blood is extremely rare, with fewer than 50 people known to have Rhnull blood in the 50 years since its discovery. Its rarity means that Rhnull donations are rare and difficult to obtain when an Rhnull person needs a blood transfusion, and we rely on the cooperation of a small network of regular Rhnull donors around the world to ensure that blood types are always available when necessary. Interestingly, for reasons not well understood by scientists, not all "foreign" antigens can be targeted for antibody destruction. There are a total of 36 blood types, but there are certain blood types that doctors and patients should pay attention to when transfusing. For example, AB0 antibodies are almost always clinically important. Other blood types that can cause transfusion reactions include MNS, Kell, Kid, and Duffy blood types.

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