'Abzyme' theory of Long COVID

Steven Zeicher believes that antibodies against spike protein can have enzymatic activity somewhat like ACE2.

Weaknesses of this theory include:

  • Doesn’t explain both positive and negative responses to reinfection, COVID vaccination, antibody-removing treatments like plasmapheresis, or the addition of antibodies via IVIG.
  • Doesn’t explain wide variety of symptoms.
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