Select the type of infection: bacterium, virus, fungus, parasite, prion, nanovirus, bioweapon, mind thief or Shadow Plague. Choose where the first infection starts. Each choice has its pros and cons, as well as consequences. Initially, your disease is weak and has a very low infectiousness, but no one knows about the disease yet. Drawbacks can be corrected by purchasing from the tree of infection paths, symptoms, and traits for mutation points.