Female participants with the A-C-C haplotype of CTLA4 had significantly lower risk of TB (aOR = 0.488, 95% CI = 0.263–0.905, p = 0.023) compared with those who had the most common haplotype (G-C-T) of rs231775-rs231777-rs231779 (Table 6). Here, CTLA4 is linked to tuberculosis.