Fig 7. Dynamics of COVID-19 in response to a scarcity of naïve T cells and a mild exhaustion of T cells (ρ = 0.0005) (out of 100 individual runs).

a. Time course of the average ratio of infected cells. b. Time course of average cytokines. c. Time course of average effector T cells. Red and blue lines indicate different levels of naïve T cells with ([T₀] = 10⁵ cells/ml) and ([T₀] = 2 × 10⁵ cells/ml), respectively. The error bar indicates standard deviation. Other parameters were assigned default values as shown in Table A in S1 Text.