What is the least common blood type in the world 2024?
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Studied at the University of Buenos Aires, Lives in Buenos Aires, Argentina.
Blood Types. There are four basic types of blood--A, B, AB, and O--each with a positive and negative sub-type. O positive is the most common type, with AB negative being the least common. The letter designation of the blood type indicates which antigens are present in the blood cell.
2023-04-25 13:37:32
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Charlotte Edwards
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Blood Types. There are four basic types of blood--A, B, AB, and O--each with a positive and negative sub-type. O positive is the most common type, with AB negative being the least common. The letter designation of the blood type indicates which antigens are present in the blood cell.