Bad news regardning mRNA-vaccines. "However, emerging evidence suggests that the reported increase in IgG4 levels detected after repeated
vaccination with the mRNA vaccines may not be a protective mechanism; rather, it constitutes an
immune tolerance mechanism to the spike protein that could promote unopposed SARS-CoV2
infection and replication by suppressing natural antiviral responses. Increased IgG4 synthesis due to
repeated mRNA vaccination with high antigen concentrations may also cause autoimmune diseases,
and promote cancer growth and autoimmune myocarditis in susceptible individuals." (Published May 17, 2023, in Vaccines Journal)
https://www.mdpi.com/2076-393X/11/5/991