Only one person on Earth has this blood type. What is 'Gwada negative'?

A 68-year-old woman from Guadeloupe has been confirmed as the sole known carrier of a newly discovered blood group named 'Gwada negative'. Officially recognised as the 48th blood group system by the International Society of Blood Transfusion, this ultra-rare type could hold implications for the future of transfusion science and rare blood compatibility care

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