There Are Millions of Blood Types

You’re probably aware that your blood can be A, B, AB or O, but it turns out that blood types can get a lot more complicated than that!
*We made a mistake in the credits of this video: The writer of this episode was Alane Lim.

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Sources:

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https://es.wikipedia.org/wiki/Archivo:Determinaci%C3%B3n_de_grupo_sangu%C3%ADneo_AB%2B_y_B%2B.png#/media/Archivo:Determinaci%C3%B3n_de_grupo_sangu%C3%ADneo_AB+_y_B+.png