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A New Blood Type, Gwada Negative, Was Found In A 68-Year-Old Woman From Guadeloupe. First Detected In 2011 In Paris, It Was Identified In 2019 Via Gene Sequencing As A Rare Pigz Gene Mutation. She’s The Only Known Match. It’s The 48th Blood Group; Only 8 Are Common. Blood Types Are Based On Antigens—The First, ABO, Was Discovered In 1901.

https://www.livescience.com/health/she-is-the-only-person-in-the-world-compatible-with-herself-scientists-discover-new-blood-type-but-its-unique-to-just-one-person-from-guadeloupe

After years of study, scientists have discovered a new blood type in a woman from Guadeloupe. They’re now searching for more people with the characteristic.