ABO
and Rh Blood Type
Frequencies in the United States
| ABO Type | Rh Type | How Many Have It | |
|---|---|---|---|
| O | positive | 37.4% | 44% |
| O | negative | 6.6% | |
| A | positive | 35.7% | 42% |
| A | negative | 6.3% | |
| B | positive | 8.5% | 10% |
| B | negative | 1.5% | |
| AB | positive | 3.4% | 4% |
| AB | negative | .6% | |
(Source: Stanford School of Medicine: Blood Center)
Copyright © 1999-2012 by Dennis O'Neil. All rights reserved.