Measurement of antibodies to the SARS-CoV-2 Spike protein is routine community standard of care in the assessment of long-COVID and vaccine injury syndromes. I have noticed that the most ill patients are those who had COVID-19 early and then took one or more ill-advised COVID-19 vaccines. Recall the US FDA did not allow Pfizer or Moderna to vaccinate COVID-19 recovered patients in the registration clinical trials because they had great expected harm and no opportunity for clinical benefit. Later, three studies demonstrated that indeed vaccination after infection was a bad idea with much greater risks of serious adverse events than SARS-CoV-2 naive patients.

https://substack.com/app-link/post?publication_id=1119676