which person blood group do not match two other country
Answers
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Rh factor
Blood is also typed according to something called the Rh factor. This is another antigen found on red blood cells. If the cells have the antigen, they’re considered Rh-positive. If they don’t have it, they’re considered Rh-negative. Depending on whether the Rh antigen is present, each blood type is assigned a positive or negative symbol.
What’s the rarest blood type?
It’s hard to say which blood type is the rarest in the world, since they’re linked to genetics. That means the prevalence of certain blood types varies widely in different parts of the world.
However, in the United States, AB-negative is considered to be the rarest blood type, and O-positive the most common. The Stanford School of Medicine Blood Center ranks blood types in the United States from rarest to most common as follows:
AB-negative (.6 percent)
B-negative (1.5 percent)
AB-positive (3.4 percent)
A-negative (6.3 percent)
O-negative (6.6 percent)
B-positive (8.5 percent)
A-positive (35.7 percent)
O-positive (37.4 percent)
Again, this ranking isn’t universal. In India, for example, the most common blood type is B-positive, while in Denmark it’s A-positive. These variations also exist within groups of Americans. According to the Red Cross, for instance, Asian Americans are much more likely to have a B-positive blood type than Latin Americans and Caucasians.