Who are your blood types’ ancestors?

The  8 main blood types belonging to the ABO and Rhesus systems, are seen everywhere around the world. Well, almost everywhere, since some countries beg for blood donors of certain types.

Contrary to what you may expect, the distribution differs in every corner of the globe according to many ethnic and racial analyses, done throughout the years by the blood banks around the world. If your blood type is rare in your country, you can look for your worldwide ancestors and see where you got that from. It’s nice to have American or Asian roots after all, isn’t it?

The following maps sum it up for you.

Blood type O: the Americas

As you may see, the O allele is very common around the world. More than 60% of humans share it.  Its frequency is particularly elevated among Central and South America, where it approaches 100% in some countries! It reaches high frequencies too among Australian Aborigines and in Western Europe (especially in populations with Celtic ancestors).  However, the lowest frequency of it is found in Eastern Europe and Central Asia, where B is common.

Blood Type A: Central and Eastern Europe

The A is the second most common allele around the world with more than 20% of all people sharing it. The highest frequencies are found in Scandinavia and Central Europe in small, unrelated populations, especially the Blackfoot Indians of Montana (30-35%), the Australian Aborigines (many groups are 40-53%), and the Lapps, or Saami people, of Northern Scandinavia (50-90%). The allele is almost totally absent among Central and South American Indians.

Blood type B: Asia

Overall in the world, B is the rarest ABO blood allele.  Only 16% of humanity have it. It reaches its highest frequency in Central Asia and Northern India, while it is  believed to have been entirely absent from Native American and Australian Aboriginal populations prior to the arrival of Europeans in those areas. However, there are relatively high frequency pockets in Africa as well. 

Rhesus Allele

The majority of the people in the world have the Rh+ blood type.  However, it is more common in some regions.  Most Subsaharan African populations are around 97-99% Rh+.  East Asians are 93-99+% Rh+.  Europeans have the lowest frequency of this blood type for any continent.  They are 83-85% Rh+. 

The lowest known frequency is found among the Basques of the Pyrenees Mountains between France and Spain.  They are only 65% Rh+.

Why is knowing the blood types’ distribution important?

If we combine the above-mentioned maps, this is how the blood types are currently divided around the world:

As you see, a “B” individual going to America, Europe or Australia might find some tough times looking for people of his blood type. The same applies to an “O” visiting Asia or an “A” heading to Africa.

Moreover, it is even more difficult if you’re looking for negative blood types, outside of Europe, since the positive types reach more than 90-95% of the population sometimes.

This is where we, Arabs, stand with a pretty much equally divided distribution in our countries between the A, O and B alleles. Lebanon nearly obeys this pattern, according to our statistics, where 45% of the population are “O”, 39% are “A”, 10% are “B” with a mere 4% for the “A” and “B” alleles combined.


Whenever you feel like visiting a certain country, for whatever reasons, DSC advises you to do a small research about the frequency of your blood type in it and whether it can be easily found, in case – God forbids – you might need a transfusion during your stay. If ever the country’s population doesn’t meet with your blood type, especially for the ones where some types are so predominant they might reach more than 90% of it, consider donating blood for yourself while staying there, particularly for work issues or simply grab a friend of your type with you in case you’re going sightseeing. It’s nice to be a international donor after all!


About Fred Bteich

A metal fan, a blogger and a news/sports-obsessed medical student.

8 comments on “Who are your blood types’ ancestors?

  1. It is a nice information

  2. Very informative

  3. You forgot JAPAN is 40% A+ Blood Type!

  4. I am A+…..so what origin blood type is that?

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  6. hello im at a secret location in the united kingdom and had a lot to do with the babylon and bible scriptures whom has a long lifespan and know of a couple of populated planets and dont feel computer knowledge is accurate throughout a thousands years knowledge iknow if poeple used words or literature rather than hyphenated shorthand iknow for shure a negative and a posetive is differant to the adam and eve a neg a pos types and which blood cards are your words reffering as a blood card copyrite just wanted an accurate amount and location for relocation in safeor sain world relocation without the set up of death or insanity out of the amounts of blood test taken throughout the ages yuode think a dirty used blood card of up to 40 differant blood lists my figures of one a neg from a thousand years or more any more than that would be dead family am sure a location and safety would be known

  7. if in a set up off old age authentisicestististics and authentollegy and blood copy rite of familly and world safety blood test kits would be a crime if rescent correspondance and proven clean of dissease are you not worried of world armegeggdon and punnishment in atleast theasejobs of expertise is your own punishment minimumly on the use of these traps of the passing of disease in the taking of this test what if someone was living fless and from heavon or hell how would you deffend your knowledge and proof off accurate end low rate detailst

  8. I have O neg blood group, born in Aust. Have some Celtic ancestors but really don’t know where it originates from

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