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Turns out multiple billions of years of evolution comes up with some really neat stuff, which 400 years of post-enlightenment scientific research hasn't managed to copy yet.

Antibodies not only bind to specific molecules, they DON'T bind to anything else. The lack of false positives means the immune system can use very quiet signals to target attacks.

https://mastodon.social/@Apiary/113235888071501353

If biological signaling couldn't avoid false positives latching to receptor molecules our blood would clot in our veins