Which blood type has the most people

In our lives, many people have different blood types. Most people's blood types are inherited from their parents. The more common blood type is O type, and the least common blood type is Rh negative blood. When we have a serious illness and need surgery, we need a blood transfusion. Only the same blood type can be transfused, otherwise there will be a rejection reaction. So which blood type is the most common?

O blood type is the most common in the world, accounting for about 63% of the population:

Distribution of blood types. The blood type distribution of people of different races and regions is different. There are also differences among different ethnic groups within the same race. In general, O+ is the most common and AB- is the least common. The B allele is most commonly found in Central Asia, followed by Africa, and relatively less in America and Australia. In the world, the B allele is the least common of the ABO blood type alleles, accounting for only 16% of the population. The A allele is more common than the B allele, accounting for about 21% of the world's total population. They are distributed more sparsely, such as the Blackfoot Indians in Montana (30-35%), the Australian Aborigines (40-53% in many groups), the Lapps in northern Scandinavia, or the Sami (50-90%), while there is almost no A allele among the Indians in Central and South America. As for the O blood type, it is the most common in the world, accounting for about 63% of the population. They are mainly concentrated in Central and South America, where nearly 100% of the people have O blood type, followed by the Australian Aborigines and Western Europe (especially the Celts), and less common in Eastern Europe and Central Asia.

Blood type O: Hong Kong Chinese (40%) | Peruvian indigenous people (100%) | Sweden (38%) | Beijing (29%)

Blood type A: Hong Kong Chinese (26%) | Peruvian indigenous people (0%) | Sweden (47%) | Beijing (27%)

Blood type B: Hong Kong Chinese (27%) | Peruvian indigenous people (0%) | Sweden (1%) | Beijing (32%)

Blood type AB: Hong Kong Chinese (7%) | Peruvian natives (0%) | Sweden (5%) | Beijing (13%)