The development of high-affinity antibodies in response to infection is an iterative process in which B cells cycle between proliferation/somatic hypermutation and antigen-driven selection. These processes occur within specific regions of the secondary lymphoid structures known as germinal centers (GCs) and the environmental and signaling cues provided by these regions guide the GC reactions that drive B cell maturation and antibody production, ultimately determining B cell fate. In this issue of the
Yee Ling Wu, Cristina Rada
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