What is +ve and -ve blood group ?
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If your blood is A positive (A+), it means that your blood contains type-A antigens with the presence of a protein called the rhesus (Rh) factor. Antigens are markers on the surface of a blood cell. According to the American Red Cross, this is one of the most common blood types
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Like A, B and O, the positive or negative component of a person's blood type refers to a molecule which is either present or absent on the surface of their red blood cells. In this case, it's an antigen in a blood group system called the Rh (originally called Rhesus) system. ... If you don't have it, you're Rh negative.
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