CD27 and tuberculosis: In response to TB1 stimulation at T0, we found that the CD45RA-CD27+ subset was significantly lower in active-TB compared to TBI and TBI-IMID (p = 0.0021; p = 0.0027) and the CD45RA-CD27- subset was significantly higher in active-TB compared to TBI and TBI-IMID (p = 0.0058; p = 0.0041) (Figure 9A).