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Blood Types
What is the most common blood type? The approximate distribution of blood types in the US population is as follows. Distribution may be different for specific racial and ethnic groups:| O-positive | 38% |
| O-negative | 7% |
| A-positive | 34% |
| A-negative | 6% |
| B-positive | 9% |
| B-negative | 2% |
| AB-positive | 3% |
| AB-negative | 1% |
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