FCGR2B and COVID-19: Furthermore, other markers for IVIg-immunomodulation in CIDP, like increasing CD32b expression on classical monocytes (Tackenberg et al. 2009) and a decrease of myeloid dendritic cells (Dyer et al. 2016), were not altered after COVID-19 vaccination, further supporting the assumption that COVID-19 mRNA vaccine does not have a relevant impact on immunomarkers for CIDP.