Editing Plague (section)

=== [[File:IconPopulation10x.png|frameless|28x28px]]Generation and Transmission ===
Apart from being manually spread by the player, plague can also be generated by high densities of [[rats]] (more precisely, any unit with the "rat" trait; does not include rat kings). Specifically, for any given rat, if there are more than 10 rats within the same or neighboring zones AND within a 10-tile radius, it has a 14% chance to attempt to spread to units within a 6 tile radius. If this attempt is successful, every unit within range has an 50% independent chance to obtain the plague trait. Rats and rat kings are immune to the plague trait. Rats can naturally spawn in abandoned [[Villages|buildings]] and the [[Wasteland Biome|wasteland]] biome.   

Plague can be spread to creatures who are nearby. Whenever the plague trait effect is triggered, it has a 5% chance to attempt to spread to units within a 6 tile radius. If this attempt is successful, every unit within range has an 50% independent chance to obtain the plague trait. Plague is a dangerous tool as it can spread across most of the world quite rapidly. Even if separated by water, populations can contract the plague via flying creatures or boats. 

You can see the spread of the plague by enabling the "ShowPlagueInfection" in the [[Debug Menu|debug menu]]. It highlights zones different shades of purple to show varying densities of creatures with the plague.