Figure 4  Heatmap describing the impact of varying virus virulence and survival trait values assessed across four key epidemic metrics: these heatmaps express the change in (A) the number of infected individuals (asymptomatic and symptomatic) at the epidemic peak; (B) the rate at which the epidemic peak is reached, tmax−1; (C) the total infected population after 30 days; and (D) the basic reproductive ratio (R0) when virulence and survival are modulated by ±5% within the model.