Having a rare blood group (such as AB negative) would make someone a rare blood donor.
ab neative
According to the red cross website AB- is the rarest blood type, but B- and AB+ are also rare. Ethnicity may impact blood type: O- is rare in Asian people but relatively common for Caucasians.
Ultra rare omega rare
Common blood can be transfered to rare blood but rare blood can not be transfered to common blood.
Approximately 9.4% of the population has the B+ blood type.
A rare blood type is a blood type that can be used for blood transfusions in many patients. The rarest blood type is O negative; or the blood type of a universal donor. If you have a rare blood type, you can find out by getting checked out by a doctor or looking through your genetic history.
It is rare because only 15% of the world has O negative blood.
S. Very rare
While type O negitive blood is pretty rare, the rarest blood type is actually AB negitive. It represents only about .6% of the populations blood types.
AB negative is the rarest blood type. AB positive is the second rarest blood type. The negative blood types are more rare than the positive. The common blood type is o.
There are many bloodtypes--both positive and negative. I know, from experience, that o positive blood type is not rare. It is used as the universal donor. A-, B-, AB- are known to be rare blood types. I believe o- is a rare blood type, as well. A good book from the public libary would further esplore the many different blood types and the statistics correllated with specific blood types.
The most common blood type is A positive and the most rare is type O.
People were born with rare blood. You can most likely find it at blood banks. You can see the difference in blood types by taking a test with the blood.