Figure 3. Impact of the parameters on the nature of the equilibrium regime.

Situations are divided into the 3 regimes described in the main text (see also Fig. 2). (a) For different values of the activation rate of APCs by effector cells (τ_ae⁰) and different rates of regression of APCs by regulatory T cells (τ_r⁰), with λ_r⁰ = 10⁴; (b) for different values of the activation rate of APCs by effector T cells (τ_ae⁰) and different rates of inhibition of effector cells by regulatory T cells (λ_r⁰), with τ_r⁰ = 1; (c) same as (b) but with τ_r⁰ = 10; (d) same as (b) but with τ_r⁰ = 0.1.