What is the most common blood type?
This is an average distribution of the blood types in the United States. The distribution may be different for specific ethnic groups:
- O Rh-positive - 38 percent
- O Rh-negative - 7 percent
- A Rh-positive - 34 percent
- A Rh-negative - 6 percent
- B Rh-positive - 9 percent
- B Rh-negative - 2 percent
- AB Rh-positive - 3 percent
- AB Rh-negative - 1 percent
