It is found in 47% of African Americans, 53% of Latino Americans, 39% of Asians, and 37% of Caucasians. 1 O+ blood can be given to any positive blood type, which is the least rare.

Based on statistics, the rarest blood type is AB negative. According to the American Red Cross, AB negative blood type occurs in "1% of Caucasian, 0.3% of African American, 0.1% of Asian and 0.2% ...

The rarest blood type is called Rhnull. Only around 1 in every 6 million people have Rhnull blood. Learn about other blood types and their compatibilities in this article.