That’s you! O negative blood can be given to anyone. And type AB positive is called the Universal Recipient. Everyone else is somewhere in between.
pallas__athena is sleepdeprived
nods I read up on it but it took me quite long time to wrap my head around why I could donate to everyone but couldn’t get blood back. Why it worked in one direction and not the other so to speak, but I think I figured it out in the end.