Not sure if this is true… but it wouldn’t surprise me:
Edit: looks like it might be:
Researchers at the University of Cologne and University Hospital Cologne have shown in their study that the novel mRNA-based COVID-19 vaccines not only induce acquired immune responses such as antibody production, but also cause persistent epigenetic changes in innate immune cells. The study ‘Persistent epigenetic memory of SARS-CoV-2 mRNA vaccination in monocyte-derived macrophages’ led by Professor Dr Jan Rybniker, who heads the Division of Infectious Diseases at University Hospital Cologne and is a principal investigator at the Center for Molecular Medicine Cologne (CMMC), and Dr Robert Hänsel-Hertsch, principal investigator at the CMMC, was published in Molecular Systems Biology.