Our research program aims to uncover how germinal centers (GCs) generate protective antibodies and to define the immunological principles that distinguish effective from ineffective immune responses. While B cells, long considered the main protagonists of GC biology, are responsible for producing antibodies, their ability to generate potent, high-affinity antibodies critically depends on a partnership with T follicular helper (TFH) cells. These specialized T cells are essential for selecting and expanding B cells that have successfully optimized their antibodies during the GC reaction, positioning them as key drivers of robust and durable humoral immunity. Understanding how these cells collaberate and compete within the GC is our mission.