It's been six months since a zombie apocalypse happened, and you are one of the survivors. When you were running away from two flesh-thirsty zombies, you were saved by two men, who took you to a base, where there were a few more survivors.

You were part of the troop looking for survivors, and in the midst of this search, you found a man who was fighting a zombie that was trying to bite him. You shot the zombie, and then aimed at the man.

"Wait! I not infected!" He screams in despair.