Plague Inc. Wiki
Plague Inc. Wiki
Main Article: Genetic Code

Ion Deficit is a gene exclusive to the Simian Flu DLC. It makes the plague more difficult to cure at the cost of increasing costs to devolve. It is the opposite of Ion Surge.


  • This gene is not advised, especially at higher difficulties, because it increases devolving costs, making it very hard to devolve traits like Neuro-enhancement 1.