AB-
Critical Demand
Universal Plasma Donor
AB Negative Blood Type: The Rarest — and Why It Matters
The rarest blood type in Oklahoma — and among the most versatile.
1%
of Oklahomans have AB− blood
Your blood is critically needed at Oklahoma donor centers.
Quick Facts
Prevalence in Oklahoma
~1% of population — rarest type
Red cells can donate to
AB+ and AB−
Plasma can donate to
ALL 8 blood types (universal plasma donor)
Can receive from
A−, B−, O−, AB−
Best donation type
Plasma
AB negative (AB−) is the rarest blood type in Oklahoma, found in approximately 1% of the population. Despite having the most restricted red blood cell compatibility (can only donate to AB+ and AB− patients), AB− shares AB+ 's status as a universal plasma donor — AB− plasma can be given to any patient of any blood type.
The rarity of AB− means that when Rh-negative AB patients need red blood cells, the supply is extremely thin. Only AB− and (in some contexts) O− can be used. This makes each AB− whole blood or red blood cell donation extraordinarily valuable for the small but critical subset of patients who need it.
Plasma donation is where AB− donors make the broadest impact. AB− plasma is just as universally compatible as AB+ plasma — it can go to any patient regardless of blood type or Rh factor. If you have AB−, your plasma donations are among the most impactful contributions any single donor can make to the Oklahoma blood supply.
Compatibility Chart for AB-
| Blood Type | AB- Can Donate To | AB- Can Receive From |
|---|---|---|
| O- | — | ✓ |
| O+ | — | — |
| A- | — | ✓ |
| A+ | — | — |
| B- | — | ✓ |
| B+ | — | — |
| AB- | ✓ | ✓ |
| AB+ | ✓ | — |
Common Myths About AB- Blood
Myth: "AB− is so rare that donating doesn't make a statistical difference."
Fact: For AB-negative patients who need red blood cells, AB− is one of the only options. And for plasma, every AB− unit is universally usable — the impact extends far beyond other AB− patients.
As one of the rarest donors in Oklahoma, your AB− plasma helps patients of every blood type.