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As you probably know, we all have a blood type. But do you know what makes each type unique? While several blood group systems are used to type your blood, ABO is the most important. Your ABO type is based on the presence or absence of two antigens (A and B) on the surface of red blood cells. There are four ABO types: A, B, AB and O. Your blood type is also determined by A+ A- B+ B- AB+ AB- O+ O- Each of these eight types is unique. Blood types determine who you can give blood to and receive blood from. Which By Krista Thomas, Communications Strategist, with medical support and expertise from Dr. Tho Pham, Chief Medical Officer While all blood donors are united by the same general donation experience and, typically, the same passion for supporting others in the community, we naturally tend to distinguish ourselves by our blood types. And doing so is only… How Rare Is My Type?* “The rarest blood type is the type that’s not available when YOU need it!” Blood Type How Many Have It Frequency O + 1 person in 3 37.4% O – 1 person in 15 6.6% A + 1 person in 3 35.7% A – 1 person in 16 6.3% B + 1 person in 12 8.5% B – 1 person in 67 1.5% AB + 1 person in 29 3.4% AB – 1 person in 167 .6% *These are general estimations for educational purposes only. Actual data may vary. Original source: AABB Technical Manual 18th Edition OUR MISSION: We lead the fields of transfusion and transplantation medicine by advancing science and technology. We provide hope for the future by teaching the medi...

You are probably aware of the two main blood group systems: the AB system and the rhesus system. Under the AB system, there are four main blood types A, B, AB and O. And each of these four types can be “rhesus positive” or “rhesus negative”. It may surprise you to hear, though, that there are many more blood group systems than just these two. Indeed, researchers at the University of Bristol recently completed the Blood comprises white blood cells, plasma, platelets and red blood cells. It is the red blood cells that define these classification systems. Although healthy red blood cells all appear the same down the microscope, close-up inspection shows they have crucial differences in the form of “antigens” – proteins and sugars that coat the red blood cells’ surfaces. It is these antigens that determine which blood group a person belongs to. Most people go through life not really thinking about their blood group, but there are two stages in life when blood groups are fundamentally important: during pregnancy and when a blood transfusion is needed. The Landsteiner found three blood group types, which he named A, B and O (for the ohne, meaning without or null, because it didn’t clump at all). Researchers at Landsteiner’s lab later discovered a fourth blood group: AB. Today, we know the reason people with, say, blood group A can’t donate blood to people with blood group B is because of antigens. Someone with A has the A antigen on their red blood cell surface and antibodies in...

The rarest blood type is Rhnull. Unlike other blood types, people with Rhnull blood have no Rh antigens on their red blood cells. However, of the eight main blood types, AB- is the least common. Researchers estimate that just Healthcare professionals classify blood type according to the presence or absence of antigens, which are proteins attached to red blood cells. In this article, learn more about the rarest blood type. We also cover other blood types, including whether or not they are compatible with each other. Share on Pinterest Rhnull is the rarest blood type. Having a rare blood type can make it difficult or even impossible to get a blood transfusion or organ transplant. It can also cause other health issues. For example, if their blood is incompatible with a developing fetus, pregnant women with rare blood types may experience complications. Most blood types fall into one of For example, people with A antigens have type A blood, while those with B antigens have type B blood. People with both A and B antigens have type AB blood, while people with neither antigen on their red blood cells have type O blood. In addition to the blood group type, a person may also carry Rh factor on their red blood cells. A person without Rh factor has Rh- blood, while someone with it has Rh+ blood. For example, a person with AB blood and Rh factor has AB+ blood. Some people, including those with Rhnull blood, lack one or more common antigens. There are more than Although most people hav...

• If you have blood type A, you have an A antigen. • If you have blood type B, you have a B antigen. • If you have an AB blood type, you have both A and B antigens. Since a person has all of the antigens that are possible, this blood type is the rarest. • If you have type O blood, you have no antigens. O negative blood is considered the universal blood donor type because it is compatible with type A, AB, B, and O positive blood. • National Cancer Institute. • American Red Cross. • Dean L. Blood Groups and Red Cell Antigens [Internet]. Bethesda (MD): National Center for Biotechnology Information (US). • Dean L. Blood Groups and Red Cell Antigens [Internet]. Bethesda (MD): National Center for Biotechnology Information (US). • Red Cross. • Delaney M, Wendel S, Bercovitz RS, et al. Lancet. 2016;388(10061):2825-2836. doi:10.1016/S0140-6736(15)01313-6 • Harewood J, Ramsey A, Master SR. • Suddock JT, Crookston KP. • Cedars-Sinai. • Farhud DD, Zarif Yeganeh M. Iran J Public Health. 2013;42(1):1-6. • American Red Cross. • Nambiar RK, Narayanan G, Prakash NP, Vijayalakshmi K. Proc (Bayl Univ Med Cent). 2017;30(1):74-75. doi:10.1080/08998280.2017.11929536 • Cleveland Clinic.

30% of the population has the A+ blood type A+ blood contains both A and Rh antigens. A+ red blood cells can be given to both A+ and AB+ patients. A+ plasma and platelet donations are important blood products that can be used for many patients needing these types of transfusions. Therefore, A+ donors are encouraged to donate platelets, plasma or whole blood.

Healthlineonly shows you brands and products that we stand behind. Our team thoroughly researches and evaluates the recommendations we make on our site. To establish that the product manufacturers addressed safety and efficacy standards, we: • Evaluate ingredients and composition:Do they have the potential to cause harm? • Fact-check all health claims:Do they align with the current body of scientific evidence? • Assess the brand:Does it operate with integrity and adhere to industry best practices? We do the research so you can find trusted products for your health and wellness. The concept of blood type diets was originally put forth by the naturopathic physician Dr. James L. D’Adamo. His son, Dr. Peter J. D’Adamo, popularized the diet in his book, “ Blood type diets are a system of eating which categorize foods as beneficial, neutral, or harmful. It’s based on a person’s blood type and other factors. D’Adamo claims foods harmful to your blood type cause an agglutination reaction. This makes blood cells stick together, increasing the risk of disease. Read on to learn more about this diet and D’Adamo’s claims. The blood type diet requires a regimen called compliance. This refers to eating “beneficials.” Beneficials are chosen for each blood type, based upon the lectins, or molecules, which the food contains. On this diet, people are defined as being “secretors” or “nonsecretors.” These terms refer to an individual’s ability to secrete blood type antigens into bodily fluids....

Experts commonly use the ABO and Rh systems to group blood types. The ABO system puts blood types into four categories: A, B, AB, and O. The Rh system complements the ABO system by assigning a positive or negative sign to blood types. Below is a breakdown of the ABO blood types: • Type A: has A antigens on the red blood cell surface and anti-B antibodies in the plasma • Type B: has B antigens on the red blood cell surface and anti-A antibodies in the plasma • Type O: has both anti-A and anti-B antibodies on the surface, and both anti-A and anti-B antibodies in the plasma • Type AB: has both A and B antigens on the surface, but no antibodies in the plasma Depending on whether Rh factor is present or absent, a person’s blood type can be positive or negative. This means a person can typically have • A-positive (A+) • A-negative (A–) • B-positive (B+) • B-negative (B–) • O-positive (O+) • O-negative (O–) • AB-positive (AB+) • AB-negative (AB–) The genes you inherit from your parents Trusted Source PubMed Central Highly respected database from the National Institutes of Health The majority of people have an Rh-positive blood type. A+ is one of the most common blood types, accounting for around Why does blood type matter? Your blood type can increase your risk of certain conditions and lower your risk of others. This is because the characteristics found in the genes responsible for the different blood types are linked to the likelihood of developing other medical conditions. A T...

Regular blood testing is one of the most important ways to keep track of your overall physical well-being. Getting tested at routine intervals can allow you to see the way your body changes over time and empower you to make informed decisions about your health. What does a blood test show? Some blood tests can help your doctor determine how different organs in your body are working. Examples of organs whose malfunctions can be visible in a blood test Your doctor can also use blood tests to search for markers of diseases and health conditions such as: • diabetes • HIV • anemia • cancer • coronary heart disease Even if a person does not have heart disease, a blood test can show whether they may be at risk of developing the condition. Other blood tests can indicate whether the medications you’re taking are working properly, or assess how well your blood is clotting. Let’s take a closer look at some common blood tests. 1. Complete blood count A routine complete blood count (CBC) checks for levels of 10 different components of every major cell in your blood: white blood cells, red blood cells, and platelets. Important components this test measures include red blood cell count, hemoglobin, and hematocrit. Here’s the Component Normal range red blood cells (cells responsible for carrying oxygen throughout the body) male: 4.3–5.9 million/mm 3; female: 3.5–5.5 million/mm 3 white blood cells (immune system cells in the blood) 4,500–11,000/mm 3 platelets (the substances that control t...