Immunogenicity
IgG antibody responses to ID93 were evaluated in each treatment group. Serum IgG antibody enzyme-linked immunosorbent assays (ELISAs) were performed on samples collected on Study Days 0, 14, 56, 70, 84, and 224 for total IgG, IgG1, IgG2, IgG3, and IgG4. Total IgG was also assessed for the subunit proteins comprising ID93 (Rv1813, Rv2608, Rv3619, and Rv3620). Serum levels of ID93-specific IgG antibodies are presented as mean endpoint titer (MEPT), along with response rate and fold-change for total IgG, by treatment regimen (Fig. 