CHEATERS. “The origins of a suicidal program in single‐celled organisms are hard to understand, because the cells that acquired the ability to kill themselves would likely have a disadvantage and the emergence of “cheaters” with mutant genes would impair the maintenance of such a program. However, the emergence of such a process could be explained in the context of an infection.”
https://celldeath.files.wordpress.com/2010/11/lopezself_munoz.pdf