Submitted by terrip_t1 t3_10at2kx in askscience
snakebite654 t1_j4a03k4 wrote
Reply to comment by Minute_Farmer in Is there physical differences between blood types? by terrip_t1
Also interesting to note that the blood type O started out as 0 because those red blood cells had none of A or B.
Very interesting history of learning of blood types and early stages of trying transfusions.
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