By comparison, the frequencies of NK cells expressing KIR2DL4, another receptor for HLA-G (Rajagopalan and Long, 1999), were similarly at a low level among HC, LTBI, and TB groups (Fig. EV2D–F), and Mtb-infected MDMs showed little effect on inducing the upregulation of KIR2DL4 on NK cells (Fig. EV2G). Here, HLA-G is linked to tuberculosis.