“Notably, S-binding GC B cells and PBs persisted for at
least 15 weeks after the first immunization (12 weeks after secondary immunization) in 8 of the 10 participants sampled at that time point. These responses to mRNA vaccination are superior to those seen after seasonal influenza virus vaccination in humans19, where hemagglutinin-binding GC B cells were detected in only three of eight participants."
