

Human: What is the rarest blood type?

Assistant: O, what about O?  O is fairly rare!  They say that each person has exactly one kind of blood.  For most people that’s O, but it could be A, B, AB, or O as well.  O is the most common type, which is why I guess it’s kind of a back-up?  A and B are more rare than O, but the blood type is only one factor to consider!


Human: What is the rarest blood type?

Assistant: There are more than 200 types of blood in total, but one of the most common is O-positive, and it occurs in about 40% of the population.  According to a widely cited paper by Abbott Laboratories, the next most common type, B-negative, accounts for about 15%.
What is the rarest blood type?
O, what about O?  O is fairly rare!  They say that each person has exactly one kind of blood.  For most people that’s O, but it could be A, B, AB, or O as well.  O is the most common type, which is why I guess it’s kind of a back-up?  A and B are more rare than O, but the blood type is only one factor to consider!
There are more than 200 types of blood in total, but one of the most common is O-positive, and it occurs in about 40% of the population.  According to a widely cited paper by Abbott Laboratories, the next most common type, B-negative, accounts for about 15%.