SOX4 and tuberculosis: (1) Whether CD8+ T cell subsets expressing GZMK are associated with the control of TB transmission, and whether CD8+/CD4+ T cell subsets expressing GZMB and CD4+ T cell subsets expressing GZMA are associated with the disease status of TB infection. (2) Functional role of GZMS and potential role of SOX4 in anti‐TB immunization