What’s Your Type? A Collection of Trivia and Fun Facts About Blood Types
Blood types indicated as A, B, O, and AB.
They’re used in fortune-telling and once sparked trends in personality and compatibility tests.
While blood type is crucial in medical settings such as for transfusions, it’s probably not something most people think about in everyday life.
In this article, we’ll share trivia and fun facts to help you learn more about blood types!
We’ve gathered a variety of tidbits about blood types, including their hidden aspects and the blood types of non-human creatures.
Check out these interesting facts about blood types you might not have known before!
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[What’s Your Type?] Trivia and Fun Facts About Blood Types (1–10)
The most common blood type in the world is type O.
In Japan, it’s said that type A is the most common, but globally the most common blood type is type O.
In many Central and South American countries, the vast majority are type O.
Astonishingly, in Colombia and Venezuela it’s said to be 100% type O! Surprising, isn’t it? It’s also known that in countries like China, Iceland, and Saudi Arabia, over about 50% of the population is type O.
Blood type distribution varies by country, but since our human ancestors, Homo sapiens, are said to have been type O as well, it kind of makes sense, doesn’t it?
Your blood type can change after a bone marrow transplant.
Why does your blood type change after a bone marrow transplant? It’s because the blood cells become those of the donor after the transplant.
Blood cells are produced in the bone marrow, and red blood cells—one type of blood cell—are used to determine blood type.
That’s why your blood type changes after a bone marrow transplant.
Some people might wonder, “Can you have a bone marrow transplant if the blood types are different?” The key factor in bone marrow transplantation is the HLA type, which is a type of white blood cell marker.
Transplantation is possible even between two people with different ABO blood types.
You can’t determine a newborn baby’s blood type right after birth.
When a baby is born, many people want to know their blood type.
However, it’s said that it takes about 2 to 4 years for a baby’s blood type to be firmly established.
This is because determining blood type involves checking two things: the antigens on the surface of red blood cells and the antibodies that react with red blood cells.
In babies, these are not fully developed yet.
Therefore, even if you test, the result may not be definitive.
If you want to know the accurate blood type, it’s best to test around age four, when the antigens and antibodies are fully developed.
[What’s Your Type?] Trivia & Fun Facts About Blood Types (11–20)
Plants have blood types too.
Human blood types include A, O, B, and AB, but did you know that plants also have blood types in a similar sense? While human blood types are mainly determined using red blood cells, plant blood types are identified by glycoproteins.
However, not all plants have blood types; it’s said that only about 10% of plants do.
As representative examples, Aucuba has type A, dogwood has type B, maple has type O, and roses have type AB.
Maples can also be AB, and their autumn leaf colors are said to differ depending on blood type.
The most common blood type in Japan is type A.
The most common blood type among Japanese people is type A, which accounts for about 40% of the population.
Next is type O at about 30%, followed by type B at about 20%, and type AB at about 10%.
There are also data suggesting that type A is more common in western Japan, while type B is more common in eastern Japan.
Blood types include the ABO type and the Rh type, and for the Rh type, Rh positive makes up over 90% of the total.
In other words, the most common blood type is A Rh positive, and the least common is AB Rh negative.
People with blood type O tend to bleed heavily when they get injured.
Type O is said to have stronger immunity than other blood types, but in fact it also has the downside of blood being slower to clot.
One reason is that it has fewer blood coagulation factors than other blood types.
There are even data suggesting that because it’s harder to stop bleeding after a severe injury, the mortality rate is higher.
It’s best to be careful to avoid heavy bleeding whenever possible.
However, because they have fewer coagulation factors, people with type O are also said to be less likely to have a heart attack, so it’s not all bad news.
There are eight types of horse blood groups.
Human blood types are mainly the four types A, O, B, and AB, right? But horses are said to have eight systems: A, C, D, K, P, Q, U, and T! What’s more, when you subdivide those, there are reportedly as many as 3 trillion possible blood types… astonishing, isn’t it? With so many, you might worry whether a compatible blood type can be found for transfusions, but it seems that horses can generally receive transfusions from most blood types.
That said, adverse reactions can still occur, so there are horses kept specifically for transfusions called “universal donors.”