Misfolded proteins that cause pathologies. The most obvious example is creutzfeld Jacob’s disease. Also known as mad cow disease, the misfolded amyloidogenic or prion proteins cause neuro degenerative disorders amongst other things. There are some independent labs researching but it does appear spike protein can cause this. Obviously a greater issue for those that took the injection but it will potentially affect those who caught Covid. So basically most people. But still needs verifying and scientific investigation