Your blood type is determined by the antigens it contains. There are two major types of blood antigens: ABO and Rh, which combine to create blood types: O+. O-, A+, A-, B+, B-, AB+ & AB-
| If your blood type is: | You can give to: | You can receive from: |
|---|---|---|
| O Positive | O+, A+, B+, AB+ | O+, O- |
| A Positive | A+, AB+ | A+, A-, O+, O- |
| B Positive | B+, AB+ | B+, B-, O+, O- |
| AB Positive | AB+ Only | All blood types |
| O Negative | All blood types | O- only |
| A Negative | A-, A+, AB-, AB+ | A-, O- |
| B Negative | B-, B+, AB-, AB+ | B-, O- |
| AB Negative | AB-, AB+ | AB-, A-, B-, O- |