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submitted 6 days ago by [email protected] to c/[email protected]

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[–] [email protected] 11 points 6 days ago (2 children)

There are about 47 known blood types, and they are not all just 1-2 letters.

[–] [email protected] 4 points 6 days ago

wow til

[–] [email protected] 1 points 6 days ago* (last edited 6 days ago)

48. But the ABO and Rh systems are still the main categories.