When we separate the ‘O’ types into ‘negative’ and ‘positive’ we find that ‘O’ negative (the universal donor blood) constitutes less than 7 of the worlds population. Blood type ‘O’ is the most common of the blood groups. The second most common blood type is A positive which occurs in "33% of Caucasian, 24% of African American, 27% of Asian and 29% of Latino American" populations. Therefore, there must have been some manner of intervention giving rise to Rh-negative blood groups. This blood type is in high demand since it is " the most frequently occurring blood type." If your blood lacks the protein, youre Rh negative. If your blood has the protein, youre Rh positive. To break down further, O positive occurs in "37% of Caucasian, 47% of African American, 39% of Asian and 53% of Latino American," populations, according to the American Red Cross. Rh factor blood test: Rhesus (Rh) factor is an inherited protein found on the surface of red blood cells. ![]() If your blood has the Rh factor, youre Rh positive. Four books describing the different blood groups. Type A Type B Type AB Type O Blood is also classified by rhesus (Rh) factor. The most common blood type is O positive, which is the blood type of 37% of the U.S. About 40 of the Japanese population is type A and 30 are type O, whilst only 20 are type B, with AB accounting for the remaining 10. ![]() Just Curious? Your everyday questions, answered What is the most common blood type? What is the healthiest blood type People with type O blood have the lowest risk of heart disease while people with B and AB have the highest. What is the smallest unit of life? Get to know what makes up all living things. ![]() The blood type of B negative is also uncommon, occurring in "2% of Caucasian, 1% of African American, 0.4% of Asian and 1% of Latino American" populations, according to the American Red Cross. There are over 600 other known antigens, and the absence or presence of them creates " rare blood types." Someone's blood type is considered rare if they lack "antigens that 99% of the people are positive for." If you lack an antigen 99.9% of people have, your blood type is " extremely rare."
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