Figure 2.

Immune Response with and without IL-2 Therapy

The T-cell response model, Equation (1), was numerically solved in the presence (red) and absence (black) of IL-2 injections. The values of (A) Tconvs, (B) Tregs, and (C) IL-2 concentration were normalized to their maximum value in the absence of IL-2 injections. For IL-2 therapy, constant doses of 0.5 (arbitrary unit) are administered every unit of time ($\delta =1$). The initial conditions are set to zero.