What are the 3 rarest blood types?

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Accepted Answer

The rarest blood types globally are AB negative, B negative, and Rh-null, often called "golden blood" because it's found in fewer than 50 people worldwide. AB negative and B negative are rare too, making up a small percentage of the population depending on the region. Knowing your blood type matters for emergencies, transfusions, and pregnancy care, so it's worth getting tested and noted down.