Blood Types in the U.S.
| Blood Type & Rh | How Many Have It | Frequency | |
| O | Rh Positive | 1 person in 3 | 37.4% |
| O | Rh Negative | 1 person in 15 | 6.6% |
| A | Rh Positive | 1 person in 3 | 35.7% |
| A | Rh Negative | 1 person in 16 | 6.3% |
| B | Rh Positive | 1 person in 12 | 8.5% |
| B | Rh Negative | 1 person in 67 | 1.5% |
| AB | Rh Positive | 1 person in 29 | 3.4% |
| AB | Rh Negative | 1 person in 167 | .6% |
"The rarest blood type is the type that's not available when YOU need it!"
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| I F Y O U A R E T Y P E |
O+ | O- | A+ | A- | B+ | B- | AB+ | AB- | |
| O+ | * | * | |||||||
| O- | * | ||||||||
| A+ | * | * | * | * | |||||
| A- | * | * | |||||||
| B+ | * | * | * | * | |||||
| B- | * | * | |||||||
| AB+ | * | * | * | * | * | * | * | * | |
| AB- | * | * | * | * | |||||
