Least Common Blood Types

January 09, 2021

The highest frequencies are found in small unrelated populations. The stanford school of medicine blood center ranks blood types in the united.

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In eastern europe and central asia the rate of o blood is lower and b blood is more common.

Least common blood types. By rachael rettner senior writer april 01 2019 in general the rarest blood type is ab negative and the most common is o positive. The least common blood type in the u s. A blood is the second most common blood type just behind o.

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. That being said b blood is the least common group across the globe. O positive 37 4 percent a positive 35 7 percent b positive 8 5 percent.

Only around 16 of the world s. There are four major blood groups determined by the presence or absence of two antigens a and b on the surface of red blood cells. In countries such as austria denmark norway and switzerland about 45 50 of the population have this blood type whereas about 40 of poles and ukrainians do so.

Of the eight different common blood types ab negative is the least common blood type in the united states according to the american red cross. O positive is the most common type followed by a positive as the second most common and then b positive. About 27 42 of the world s population has a blood so donations from people with this blood type are always welcome so that the less common blood types can be saved for the those with rarer blood types and emergencies.

Central and eastern europe type a is common in central and eastern europe. However in the united states ab negative is considered to be the rarest blood type and o positive the most common. 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.

Dean 2005 2 1 4. And here s a more precise percentage breakdown from most common to least common blood types in the us. Is ab with less than 1 of the population having this type.

Here s a breakdown of the most rare and common blood types by.

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