Healthcare systems depend on blood donations, which are harmless for the donors because humans usually just reproduce blood and can repeat the process over and over. What about blood is so special that we can’t manufacture it in a lab or replace is with artificial blood?
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The immune system would reject it. It’s a finicky thing. We can’t even transplant organs without heavy doses of anti rejection treatments and you wanna have artificial blood coursing through the entire body? Terrible Idea.
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