In the present study, we observed lower concentrations of Th1 cytokines (IFN-γ, TNF-α, IL-6) on day 3 post-infection) and lower concentrations of one Th2 cytokine (IL-10) in infections of BCG+ donor PBMCs compared to BCG- donor PBMCs (Fig 9). The gene discussed is IL6; the disease is infection.