IgG4 antibodies after repeated SARS-CoV-2 mRNA vaccination27 Dec 2022 14:51
Class switch towards non-inflammatory, spike-specific IgG4 antibodies after repeated SARS-CoV-2 mRNA vaccination
https://www.science.org/doi/10.1126/sciimmunol.ade2798
Here, we report that several months after the second vaccination, SARS-CoV-2-specific antibodies were increasingly composed of non-inflammatory IgG4, which were further boosted by a third mRNA vaccination and/or SARS-CoV-2 variant breakthrough infections. IgG4 antibodies among all spike-specific IgG antibodies rose on average from 0.04% shortly after the second vaccination to 19.27% late after the third vaccination. This induction of IgG4 antibodies was not observed after ****logous or heterologous SARS-CoV-2 vaccination with adenoviral vectors.