The Rarest Blood Group is AB

AB is the rarest blood group, with only 3% of the global population having it. This is due to the fact that it requires both A and B antigens to be present on the red blood cells. People with AB blood can receive blood from any other blood type, but they can only donate to other AB individuals.

Why is AB blood group rare?

1. Inheritance

The AB blood group is inherited from parents who carry the A and B antigens. If both parents are carriers of the A and B antigens, then their child will have the AB blood group. However, this is a rare occurrence as most people carry either A or B antigens.

2. Evolution

The AB blood group is believed to have evolved due to the migration of human populations. As people moved from one region to another, they encountered different pathogens, which led to the development of new blood types. The AB blood group is thought to have emerged around 1,000 years ago in Europe.

3. Ethnicity

The AB blood group is more common in some ethnic groups than others. For example, it is more common in people of Asian descent than in people of European descent.

Conclusion

In conclusion, the AB blood group is the rarest blood group due to a combination of inheritance, evolution, and ethnicity. People with AB blood are unique in that they can receive blood from any other blood type but can only donate to other AB individuals. While rare, AB blood is essential for the treatment of certain medical conditions, and blood banks always need donations from people with this blood type.