Figure 20.

Distribution of tumour cell density within the tissue for decreasing p_i and $\left({\mathit{k}}_{\mathit{i}}^{\mathit{+}}\right)$, with p_N=0.5 and $\left({\mathit{k}}_{\mathit{N}}^{\mathbf{+}}\mathbf{=}\mathbf{0}\right)$. Plots showing the distribution of tumour cell density within the tissue at times corresponding to 400, 700, and 1100 days respectively. These plots illustrate the spatiotemporal onset of immunoevasion. Parameter values p_N=0.5 and $\left(k_N^{+}=0\right)$. Solid line with chemorepellent, dashed line without. The red lines represent the population T₀, The blue lines represent the summed population T₁ + … + T_N, and the black lines represent the summed population T₀ + … + T_N.