Rare blood types are O negative and AB negative. B negative and AB positive are also fairly rare blood types. O negative is known as the universal donor blood type because it is compatible with any other blood type.
Approximately 7% of people in the world have O- blood type. That said, the most rare is AB-, which approximately 1% of people have. O- is the least rare negative blood type.
O positive is a very common blood type. It is the most common blood type today. There are not many people with O negative. O negative is 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.
Having O positive blood with an Rh(Kell) negative blood type is relatively rare. The O positive blood type is the most common blood type, but the combination of O positive with Kell negative is less common. It is important to discuss any concerns with your healthcare provider regarding blood compatibility for any future medical needs.
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.
O negative blood group is rare because it lacks the A, B, and Rh antigens present in most other blood types. Only 7% of the population has O negative blood, making it less common and in high demand for blood transfusions since it can be safely transfused to individuals with any blood type.
O positive is the most common blood type. O negative is the rarest donor because it is the rarest type of blood and is often referred to as the "universal donor."
AB - blood type is the rarest blood type, followed by AB + being the second rarest. Its usually not good to have a rare blood type, considering that its rare and if you ever need a blood transfer, your blood type would be harder to find. If your considering donating your rare blood, it'll definitely be useful towards the other few people with the same blood type that need a transfer.
The rarest type of blood is O. people with O type blood can donate blood to anybody and there are very few people that have this blood type. It is extremely rare.
O Rh negative blood is relatively rare, with only about 7% of the world's population having this blood type. It is more common in people of European descent and less common in other ethnic groups. However, the rarity of O Rh negative blood can make it a valuable resource for blood donations and transfusions.
The most unique blood type is AB negative. It is considered rare, with only about 1% of the population having this blood type. AB negative individuals can receive blood from any blood type in an emergency.