by Rockefeller University The flurry of activity between B cells (blue), T cells (red), and T cells expressing Foxp3 (green), as a germinal center collapses. Credit: Johanne Jacobsen When we are exposed to a pathogen, the immune system’s B cells swarm to our lymph nodes, spleens, and tonsils. There, those cells mutate in germinal centers—microscopic boot...
