Saving Lives Together
Learn about ABO and Rh blood group systems and check compatibility between donors and recipients.
The ABO blood group system has four main types: O, A, B, and AB. These are determined by antigens on red blood cells.
Type O: No A or B antigens
Type A: Has A antigen
Type B: Has B antigen
Type AB: Has both A and B antigens
The Rh factor is another important antigen. You're either Rh positive (+) if you have the antigen or Rh negative (-) if you don't.
Rh+: Has the Rh antigen (positive)
Rh-: Lacks the Rh antigen (negative)
O- is the universal donor, and AB+ is the universal recipient. This makes them critical in emergency situations.
O-: Can donate to everyone
AB+: Can receive from everyone
Compatible
O+ blood can be transfused to A+
Quick Reference
O+ Can Give To:
O+, A+, B+, AB+
A+ Can Receive From:
O+, O-, A+, A-
| Donor | O+ | O- | A+ | A- | B+ | B- | AB+ | AB- |
|---|---|---|---|---|---|---|---|---|
| O+ | ✓ | ✗ | ✓ | ✗ | ✓ | ✗ | ✓ | ✗ |
| O- | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| A+ | ✗ | ✗ | ✓ | ✗ | ✗ | ✗ | ✓ | ✗ |
| A- | ✗ | ✗ | ✓ | ✓ | ✗ | ✗ | ✓ | ✓ |
| B+ | ✗ | ✗ | ✗ | ✗ | ✓ | ✗ | ✓ | ✗ |
| B- | ✗ | ✗ | ✗ | ✗ | ✓ | ✓ | ✓ | ✓ |
| AB+ | ✗ | ✗ | ✗ | ✗ | ✗ | ✗ | ✓ | ✗ |
| AB- | ✗ | ✗ | ✗ | ✗ | ✗ | ✗ | ✓ | ✓ |
Know your blood type? Help save lives today!