CD40LG and leprosy: As for the levels of anti-PGL-I IgM, the comparative analysis between reaction-free leprosy PB (0.61 ± 0.18) and the groups T1R (3.25 ± 0.63), ENL (4.43 ± 0.79) and reaction-free leprosy MB (2.96 ± 0.58) showed a significant difference among levels expression of that antibody as shown in Figure 1(d).