CSF2 and tuberculosis: In contrast, CD4+ T cell production of IFN-γ was significantly increased in TB patients compared to HC, both for CD4+ T cells that only produced IFN-γ (Fig. 5B, left) as well as the total percentage of IFN-γ-producing CD4+ T cells, with or without GM-CSF (Fig. 5B, right), as anticipated.