Figure 2

Suicide after immunity failure is favored compared to suicide before immunity. The color code, from red to blue, indicates the relative contribution of suicide before and after immunity to the total suicide propensity, provided that both strategies are equally accessible to the host. Horizontal and vertical axes correspond to different values of the immune efficacy and the cost of maintaining suicide, respectively. Cases of ‘no suicide’ correspond to final suicide propensities below 0.1. Fully structured population with maximum suicide efficacy CD _max  = 1.