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Share on Pinterest A person’s blood type may fall into any of the 36 human blood groups. Getty Images People can ABO system This system classifies blood types as follows: • Blood group A has A antigens on the red blood cells. • Blood group B has B antigens. • Blood group O has neither A nor B antigens. • Blood group AB has both A and B antigens. Rh system Red blood cells may have another antigen called the Rh antigen on their surface. If it is present, the blood group is Rh-positive, but if it is absent, the blood group is Rh-negative. Combining these two characteristics yields the eight most common blood types. Most people have one of these types: • O-positive • O-negative • A-positive • A-negative • B-positive • B-negative • AB-positive • AB-negative The genes that a person inherits from their parents determine the mix of antigens and proteins in their blood. These genetic factors tend to run in ethnic groups. As such, the For this reason, For some conditions, such as For example, only The least common blood type in the U.S. is AB-negative, with Statistics from the • African American: 0.3% AB-negative, 1% B-negative, and 2% A-negative • Latin American: 0.2% AB-negative, 1% B-negative, and 2% both A-negative and AB-positive • Asian: 0.1% AB-negative, 0.4% B-negative, and 0.5% A-negative • Caucasian: 1% AB-negative, 2% B-negative, and 3% AB-positive A and B antigens only represent two of approximately Having an antigen that most people do not have, or missing an antigen th...

Your blood type is determined by what kind of antigens your red blood cells have on the surface. Antigens are substances that help your body differentiate between its own cells and foreign, potentially dangerous ones. If your body thinks a cell is foreign, it will set out to destroy it. The ABO blood typing system groups your blood into one of four categories: • Type A has the A antigen. • Type B has the B antigen. • Type AB has both A and B antigens. • Type O has neither A nor B antigens. If blood with antigens that you don’t have enters your system, your body will create antibodies against it. However, some people can still safely receive blood that isn’t their blood type. As long as the blood they receive doesn’t have any antigens that mark it as foreign, their bodies won’t attack it. In other words, donations work as follows: • O: Type O individuals can donate blood to anyone, because their blood has no antigens. However, they can only receive blood from other type O individuals (because blood with any antigens is seen as foreign). • A: Type A individuals can donate to other type A individuals and type AB individuals. Type A individuals can receive blood only from other type A individuals and type O individuals. • B: Type B individuals can donate blood to other B individuals and AB individuals. Type B individuals can receive blood only from type B individuals and type O individuals. • AB: Type AB individuals can give blood only to other AB individuals, but can receive ...

If you are pregnant or considering becoming pregnant, you may have heard of the Rh factor. You probably want to know if it’s something you need to be concerned about, and you may be confused about what it actually is. This is common—it’s a bit of a confusing concept! Here, we’ll go through the ins and outs of Rh factor, including what it is, what causes it, who is at risk for complications, and what treatment options are available. What is Rh factor? Simply put, the Rhesus factor, or Rh factor, refers to a protein that’s located on the surface of red blood cells. Some people are positive for this protein, while others are negative. During pregnancy, if a pregnant person is Rh negative, but their fetus is Rh positive, complications can occur. Thankfully, though, this kind of blood type incompatibility is rare , it’s usually caught early, and treatment is effective. When you think of blood types, you usually think of the different letter types that identify the absence or presence of A or B antigens (Type O, Type A, and Type B, etc.). The Rh factor is another component that determines if your blood type is positive or negative. When you have this protein, you are considered positive. If you don’t have this protein, you are negative. For example, if you are Type A positive, that means that you have A antigen blood and that your blood cells are positive for the Rh factor. If you are Type A negative, that means that your blood doesn’t contain the Rh factor. The antigen type and...

Rh blood group system, system for classifying A.S. Weiner. Since that time a number of distinct Rh antigens have been identified, but the first and most common one, called The Rh antigen poses a danger for the Rh-negative person, who lacks the antigen, if Rh-positive blood is given in A similar hazard exists during

Hemolytic anemia occurs when red blood cells are destroyed faster than your bone marrow can make them. This can be caused by diseases, autoimmune disorders, or cancer. The treatment depends on the cause. Red blood cells have the important mission of carrying oxygen from your Hemolytic Extrinsic hemolytic Extrinsic hemolytic anemia develops by several methods, such as when the spleen traps and destroys healthy red blood cells, or an autoimmune reaction occurs. It can also come from red blood cell destruction due to: • infection • tumors • • medication side effects • • Intrinsic hemolytic Intrinsic hemolytic anemia develops when the red blood cells produced by your body don’t function properly. This condition is often inherited, such as in people with Other times, an inherited metabolic abnormality can lead to this condition, such as in people with G6PD deficiency, or red blood cell membrane instability, such as hereditary spherocytosis. Anyone of any age can develop hemolytic anemia. It’s possible that a doctor may not be able to pinpoint the source of hemolytic anemia. However, several diseases, and even some medications, can cause this condition. Underlying causes of extrinsic hemolytic anemia include: • • infectious • • typhoid fever • E. coli toxin • • • • • Wiskott-Aldrich syndrome, an autoimmune disorder • In some instances, hemolytic anemia is the result of taking certain medications. This is known as drug-induced hemolytic anemia. Some examples of medications that c...

All blood does the same thing, but not all blood is the same. Blood types classify blood so healthcare providers can determine whether one person’s blood is compatible with another’s. Blood transfusions and organ transplants depend on donors and recipients having compatible blood types. Blood types include A, B, AB and O. Overview You can safely receive blood from donors with compatible blood types. What are blood types? A blood type is a classification system that allows healthcare providers to determine whether your blood is compatible or incompatible with someone else’s blood. There are four main blood types: A, B, AB and O. Blood bank specialists determine your blood type based on whether you have antigen A or B on your This makes for eight common blood types: • A positive (A+). • A negative (A-). • B positive (B+). • B negative (B-). • AB positive (AB+). • AB negative (AB-). • O positive (O+). • O negative (O-). Knowing about blood types allows healthcare providers to safely transfuse donated blood from one person into another during a How do blood types get determined? Blood bank specialists determine blood types based on whether there are particular Your blood type is compatible with someone else’s if your immune system recognizes the antigens in donated blood as belonging. What blood types mean Most people think of A, B, AB and O when they hear the phrase “blood types.” These letters classify blood types based on whether red blood cells have the A antigen or B anti...