Moreover, among three TB infection groups (ATB, LTBI, previous TB), we observed that the level of IL-6 in TB1 tube and the level of IP-10 in TB2 tube in ATB patients were higher than these in LTBI, however, no significant distinctions were observed in the levels of IFN-γ or IL-1Ra between ATB and LTBI, despite their P-values being close to 0.05. Here, IL6 is linked to tuberculosis.