![]() ![]() ABO and Rh blood group distribution in Kayseri province, Turkey. This blood type is in high demand since it is 'the most frequently. First report of known rare Rhnull phenotype individuals in Iran. According to the American Red Cross, the most common blood type is O positive, which is the blood type for 37 of the population. Toward efficient enzymes for the generation of universal blood through structure-guided directed evolution. ABO and Rh blood type frequencies in the United States.You can learn more about how we ensure our content is accurate and current by reading our editorial policy. We link primary sources - including studies, scientific references, and statistics - within each article and also list them in the resources section at the bottom of our articles. Medical News Today has strict sourcing guidelines and draws only from peer-reviewed studies, academic research institutions, and medical journals and associations. Although it might one day be possible, doctors cannot currently change a person’s blood type. However, the researchers had to use very large quantities of the enzyme, and they did not test their theory in human participants. In theory, this would allow doctors to change a person’s blood type, potentially making it easier for them to get a transfusion. In 2015, researchers identified an enzyme that could “cut” antigens from blood cells. To be Rh-, the child must inherit two Rh- alleles. This means that if a child inherits one Rh+ allele and one Rh- allele, the child will have Rh+ blood. Parents pass on Rh factor in the same way. A parent who has O blood can only pass an O allele.Ī and B alleles are “ co-dominant.” This means that a child who inherits one of each will have AB blood.įor example, a mother with type A blood who passes on an A allele and a father with type B blood who passes on the B allele will have a child with AB blood. However, a child can have a different blood type to both of their parents, depending on which genes they inherit.Įach parent passes one allele (gene) for blood type to their child. There are more than 30 other known blood groups and more than 600 antigens.īlood type is a genetic trait. Some people, including those with Rhnull blood, lack one or more common antigens. For example, a person with AB blood and Rh factor has AB+ blood. At the same time, the rarest is AB-, only 0.40 of the population has this special blood type. A person without Rh factor has Rh- blood, while someone with it has Rh+ blood. The overall distribution of blood types Among the 7.9 billion people in the world, distributed in 195 countries and 7 continents, the most common blood type is O+, and more than 39 of the worlds population falls into this category. In addition to the blood group type, a person may also carry Rh factor on their red blood cells. 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. Most blood types fall into one of four blood type groups, according to whether they contain A or B antigens.įor example, people with A antigens have type A blood, while those with B antigens have type B blood. One Iranian woman with Rhnull blood had several pregnancy losses. The American Red Cross data below list the rare blood type and the ethnic group in which it is most common: African American: U-negative and Duffy-negative blood types Native American and Alaskan native: RzRz, also known as Rhnull or golden blood Pacific Island and Asian: JKnull blood type. For example, if their blood is incompatible with a developing fetus, pregnant women with rare blood types may experience complications. Having a rare blood type can make it difficult or even impossible to get a blood transfusion or organ transplant. The American Red Cross define a blood type as “rare” when it occurs in fewer than 1 in 1,000 people. In fact, there are millions of ways we can categorize our blood types - we just haven't defined all of them yet.Share on Pinterest Rhnull is the rarest blood type. It should be noted that while the ABO and the Rh+ and Rh- blood type group systems are the ones we are most familiar with, there are way more ways to classify our blood types. This means that although there will always be. Blood type B makes up only 10% of the population, while blood type AB is the rarest at 4%. More than two million people in Scotland have type O+ blood, making it the most common blood type in Scotland. Using data from Wikipedia and the Standford Blood Center, Reddit user foiltape put together this pie chart that shows the most common and least common blood types in the US:Īnd here's a more precise percentage breakdown from most common to least common blood types in the US:Īnd if you disregard the Rh+ and Rh- blood type classification system, and just look at O, A, B and AB blood types the most prevalent blood type in the US is blood type O (44%), with blood type A at a close second (42%). In general, blood type O-positive is the most common blood type in the world, while AB-negative is considered the rarest, but does this trend apply to the blood type distribution in the US? ![]()
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