Additional parameters related to CD4+ T cells that are stochastically different between LTBI and naïve simulations include the starting number of CD3+ T cells (only used to determine number of CD4+ T cells), CD4+ T cells, starting number of TB-specific CD4+ T cells, CD4+ T cell-activated lifespan, CD4+ T cell doubling time, and CD4+ T cell max lifespan (Fig. 6e). This evidence concerns the gene CD4 and tuberculosis.