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Ethan Martinez——Works at the International Committee of the Red Cross, Lives in Geneva, Switzerland.
Answer: The approximate distribution of blood types in the U.S. population is as follows:O-positive: 38 percent.O-negative: 7 percent.A-positive: 34 percent.A-negative: 6 percent.B-positive: 9 percent.B-negative: 2 percent.AB-positive: 3 percent.AB-negative: 1 percent.
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