Roulette
What if the world contains magical four-leaf clovers and cursed four-leaf clovers?
In this scenario, your predicted victory (technically) depends on your luck. Lucky players get more DNA points whatsoever, hinder the cure progress, infect efficiently, and et cetera, while the unlucky players get the opposite. Big fortunes such as huge DNA gain are, you probably know, rare.
Be careful because this scenario can sometimes make you feel excellent and it also can drive you nuts!