Nature Immunology, Published online: 29 November 2021; doi:10.1038/s41590-021-01077-y
Chronic viral infection leads to a dysregulation of germinal center B cell responses. Di Pietro et al. show that the epigenetic modifier BMI-1 promotes this dysfunctional response and that targeting BMI-1 in B cells can restore humoral immunity and accelerate viral clearance.