Donors with genetically-similar blood are more likely to be a match for patients from the same ethnic background. African Americans are under-represented among donors, but more likely to be a match for the majority of individuals with Sickle Cell Disease in the United States, making them ideal donors for those receiving blood transfusions regularly.
We need more African American blood donors. Here’s why
Need for African American and Latino/Hispanic Blood Donors
https://nybc.org/donate-blood/become-donor/need-african-american-and-latinohispanic-blood-donors/
Blood Donations Needed Among African Americans. Give blood Save a Life
https://www.cdc.gov/ncbddd/sicklecell/video/blood-donation/minority_BloodDonation-Transcript.pdf
Red Cross Seeking Black Blood Donors for Critical Shortages
https://www.verywellhealth.com/importance-of-black-blood-donors-5076266