What does closely matched blood mean for sickle cell patients?
Beyond ABO and Rh
Everyday transfusions match the main blood groups. For patients receiving repeated transfusions, clinicians also try to match additional red cell antigens for a closer fit.
Why it helps
A closer match reduces the chance that the body forms antibodies against donated blood, which can make future transfusions harder to match.
Determined by testing
Matching is a laboratory process. Donor ancestry can improve the odds of a match, but the final compatibility is always confirmed by testing.
Blood matching is complex. Similar ancestry can increase the chance of compatibility for some patients, but compatibility is determined by blood testing.
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This is general educational guidance, not a final eligibility decision. Donation centers make final eligibility decisions during confidential screening.
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.
- American Red Cross Sickle Cell Initiative
- AABB: diversity in the donor pool
- American Red Cross: eligibility requirements
- Last reviewed:
- Next review due:
- Editorial review:
- Reviewed against American Red Cross, AABB, and U.S. FDA donor guidance
- Clinical reviewer:
- Not yet clinically reviewed
- Confidence:
- Medium confidence