Not necessary. Initially, the monster is only one on the map. An example of an infected civilian I cited above. The whole joke is that he is NOT displayed as an enemy, but turns into him only after death. Thus, if you set a condition for loss of health in the settings of your armor, then this will start as a timer. For example, a civilian 10 health, each turn, he loses 2 health. Thus, in five moves, he will turn into a monster. Visually, the loss of health is not displayed, it is difficult to understand who is infected and who is not.