The immune cell inflammation that accompanies Mtb infection: (i) induces “stromal lymphoid tissue organizer cells” (fibroblasts, myofibroblasts, and endothelial cells) to transform into follicular dendritic cells; (ii) triggers them to produce chemokines (CXCL13, CXCL12, CCL21, CCL19), which recruit and organize T cells, B cells, and dendritic cells into iBALT; and (iii) supports high endothelial venule formation to allow lymphocyte trafficking into the infection site (122). Here, CXCL13 is linked to infection.