IL17A and infection: Th17 cells primarily secrete IL‐17, Th17 cells mainly secrete IL‐17, which promotes neutrophil recruitment to the site of infection, and T‐lymphocyte migration to the lung tissue, which plays an important role in the timely fight against MTB infection.[56] (4) Th0 cells can also differentiate into Treg cells with immunosuppressive function under the influence of cytokines like IL‐10 and TGF‐β.