Comment on Never understood this. If something foreign enters you your white blood cells go after it like a dog in heat, Would this not mean that our cells are smart enough to discern bad from good?

remon@ani.social ⁨18⁩ ⁨hours⁩ ago

All cells are covered in little bumps called antigens. Your body contains antibodies that bind to antigens on foreign cells. Your white blood cells then only attack cells that have antibodies attached to them.

So it’s not about good/bad, but really just about which cells are your own and which are foreign.

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