So I should have said race or ethnicity? Still I’m right that not every human can receive blood from every other human. A,B, O, rh factor, and several less known factors. Race is real, it’s just muddy.
You can receive blood from any racial group with matching blood type. Every race has the same blood types A, B, O+ O- etc. My blood type is universal donor. My blood can be used by every one if the 8 Billion humans on earth.