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It looks like we know about 36 different blood group systems, including the well-known ABO and Rh. https://en.wikipedia.org/wiki/Human_blood_group_systems https
by wollstonecraft 7y ago
It looks like we know about 36 different blood group systems, including the well-known ABO and Rh. https://en.wikipedia.org/wiki/Human_blood_group_systems https://en.wikipedia.org/wiki/Human_blood_group_systems