I'm still inclined to believe that it's rigged against me, and if there are too many aftershocks, I'm going to bring the world down with me in a flaming mess, but I'll recede in my disagreement now.
You should really put in a factor of how strong the efforts to control the plague are into your means of deciding casualties. put the whole operation over 1 to 10. For the sake of Nexia's all important "realisticness".
Also, I'm sending the infected on a mass crusade to overrun Nexia. Down with Amnesh.