4What Is the Rarest Blood Type Blood Type?
There are many definitions of rare blood type. Basically, a blood type is rare when it does not contain antigens that 99 percent of others are positive for. And according to the American Red Cross, a rare blood type means it is only present in no more than 1 out of 1,000 people. In the US, the rarest blood type is AB-, while O+ is the most common one. The specific statistics are as follows:
– O+: 37.4 percent of the US population
– A+: 35.7 percent
– B+: 8.5%
– O-: 6.6%
– A-: 6.3%
– AB+: 3.4%
– B-: 1.5%
– AB-: 0.6% [4]
