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Blood type compatibility chart

Quick answerO negative is the universal red cell donor and can be given to any patient, which is why it is used in emergencies. AB positive is the universal red cell recipient. For plasma it is the reverse: AB plasma can go to anyone, so AB donors are universal plasma donors.
TypeCan donate red cells toCan receive red cells fromShare of people
O-O-, O+, A-, A+, B-, B+, AB-, AB+O-about 6%
O+O+, A+, B+, AB+O-, O+about 37%
A-A-, A+, AB-, AB+O-, A-about 6%
A+A+, AB+O-, O+, A-, A+about 36%
B-B-, B+, AB-, AB+O-, B-about 2%
B+B+, AB+O-, O+, B-, B+about 9%
AB-AB-, AB+O-, A-, B-, AB-about 1%
AB+AB+O-, O+, A-, A+, B-, B+, AB-, AB+about 3%

Universal red cell donor

O negative red cells can be given to anyone, so they are reached for in emergencies before a patient's type is known.

Universal plasma donor

AB plasma is compatible with every blood type, so AB donors are encouraged to give plasma and platelets.

All blood types are needed. Patient needs change, and your donation center can advise what is most useful today.

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Sources and review

The guidance on this page reflects published criteria from these organizations. Eligibility and procedures vary by center and country, so confirm specifics with your donation center.

Last reviewed:
Next review due:
Reviewed by:
Reviewed against American Red Cross, AABB, and U.S. FDA donor guidance
Confidence:
High confidence