While Type O positive is the most common blood type. Not all ethnic groups have the same mix of these blood types. Hispanics, for instance, have a relatively high number of O’s, while Asians have a relatively high number of B’s. The mix of the different blood types in the U.S. populations are:
|Blood Type||Caucasians||African Americans||Hispanics||Asians|
(source: AABB Technical Manual)
Ninety-eight percent of people suffering from sickle cell anemia are African-American. These people – most of whom are children – need to undergo regular blood transfusions. Often, they develop antibodies to the blood they receive, leading to potentially life-threatening transfusion reactions. But if they can receive blood that’s more closely matched to their own, that risk is minimized. And the best matches are found among other African-Americans.
Following is a chart of the rare blood traits and the probabilities of finding those rare traits in African-American and Caucasian blood.
|Rare Trait (Negative from Factor)||Probability of Finding Rare Trait|
|In Caucasian Population||In African American Population|
|None Found||1 in 250|
|None Found||1 in 319|
|None Found||1 in 6,429|
|None Found||1 in 16,400|
|None Found||Not established (extremely rare)|
|2 in 10||5 in 10|
|3 in 10||9 in 10|
|1 in 10||8 in 10|