https://www.zerohedge.com/medical/repeated-covid-19-vaccination-weakens-immune-system-study

Multiple doses of the Pfizer or Moderna COVID-19 vaccines lead to higher levels of antibodies called IgG4, which can provide a protective effect. But a growing body of evidence indicates that the “abnormally high levels” of the immunoglobulin subclass actually make the immune system more susceptible to the COVID-19 spike protein in the vaccines, researchers said in the paper.