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AB blood also makes you a universal plasma donor. You can receive blood from any donor and your body will not attack it. If you have AB+ blood, you’re a universal recipient. Click on a blood type below to learn more. If you have type O-, you’re what health professionals call a universal donor. In addition to the A and B antigens, there is a protein called the Rh factor, which can be either present (+) or absent (), creating the 8 most common blood types ( A+, A-, B+, B-, O+, O-, AB+, AB- ). Health care providers use it in emergencies and to help premature babies and people with cancer. Because it can match with any blood type, it’s in high demand at hospitals. If the blood type doesn’t match, your immune system will attack it.
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Your body could also stop making enough healthy blood on its own.įor a transfusion to be safe, the doctor must be sure your blood type matches that of the donor. You may need one if you lose a lot of blood during surgery or as a result of being injured. In fact, there are about 30 others, but they’re all very rare.īlood transfusions - when more blood is added to your body - are very common. The most important antigens are blood group antigens (ABO) and the Rh. If you don’t have it, you’re Rh negative (-).Ĭombining A and B antigens with the Rh factor gives you 8 different blood types: Blood type tests may also be done to see if two people are likely to be blood relatives. If you have it, it means your blood is Rh positive (+). Type A red blood cells have A-type antigens.Īside from antigens, your red blood cells can have a special protein called Rh factor.It will create special proteins called antibodies to destroy the foreign cells. If you receive red blood cells with different antigens, your immune system will treat them just like it does disease cells that enter your body. According to followers of the blood type diet, blood type (A, B, AB or O) is said to be an important tool for understanding how someone reacts to various types of food, although there’s not strong evidence that this is true. These markers (antigens) help your body recognize cells that belong inside you. A blood type diet is one that makes health and nutrition recommendations based on your unique genetic individuality. Your red blood cells have special markers on the surface that determine your blood type.