Per the American Red Cross, in the U.S. 2% of Caucasians, 1% of African-Americans, 1% of Hispanics and 0.4% of the Asian population has Type B- blood.
Approximately 9.4% of the population has the B+ blood type.
rare
In America, 6.3% of the population have A- blood. B- and AB- are rarer.
type ab- is the rarest, with an average of 1% of the population having it.
B negative varies depending on countries, but in the U.S. about 1.6 percent have that blood type.
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.
I would say the most uncommon blood types are the negative types. Which include O-, A-, B- and AB-. AB+ is quiet rare too but not as much as the negatives. AB- is currently the most uncommon blood type.
Only 2% of the world's population has type B negative blood. The only blood type that is rarer is AB negative. It is a very rare blood type and very needed to help others.
B positive blood is a rare blood type, negatives include higher than normal cortisol levels in situations to stress and a vulnerability to autoimmune diseases.
Type B blood is rarer than type A and O, but more common than type AB. Individuals with type B blood have antigens in their blood that will attack other blood types if introduced to the body, leading to a hemolytic reaction.
AB blood type is rare. It is also a rather new blood type. People with this blood type have qualities of people with A and sometimes characteristics of those who have type B. Less than 5% of the population in America has this.
Only 2% of the people have B neg. blood. They can give blood to B neg people only. Can receive O neg. if needed. B Neg. is best. It's the newest blood group known and was develope over time for higher alatues.