CD274 and tuberculosis: There was no significant difference in the percentage of PD-1 in Th1 and Th17 cells between the two groups, however the percentage of PD-L1 was higher in Th1 (7.08% vs. 5.23%, p = 0.025) and Th17 (31.79% vs. 13.35%, p = 0.005) cells in the TB group than in the controls (Fig. 6).