this post was submitted on 30 Jan 2024
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Dad Jokes

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The nurse asked the rabbit, "What's your blood type?"

"I'm probably a type O," he replied.

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[–] ilinamorato@lemmy.world 20 points 9 months ago

No, at one point a German physician suggested using zero, as it contains no antigens. But Karl Landsteiner, who proposed the eventual system that would come to be used around the world, suggested "O" for "ohne," meaning "without"--as in, without antigens.