TLR4 and infection: After infection, the flow cytometric analysis revealed that the BCG Moreau vaccine was indeed able to induce a higher (p < 0.05) frequency of cells expressing TLR4 (almost twice), B7-1 (almost three-fold), and more strikingly, both DEC-1 and EP2 (almost four-fold each) on monocytes from the HD group (Figure 1A; Supplementary Table S1).