Researchers discover new blood group system MAL, resolving a 50-year mystery and improving care for rare blood type patients.

Researchers from NHS Blood and Transplant and the University of Bristol have identified a new blood group system, MAL, resolving a 50-year mystery about the AnWj antigen. A genetic test has been developed to detect individuals lacking this antigen, improving care for rare blood type patients and enhancing blood donor matching. This discovery marks the 47th blood group system, with significant implications for transfusion safety and patient care globally.