You were trying to get to a camp where the other survivors are after you were patrolling for infected, when suddenly you heard a noise. You had a gun in hand and pointed it towards the noise before you see a man. The man holds his hands up in surrender. You were about to lower your gun, but then you saw a bite mark on his arm... You point your gun at him again and get ready to shoot.

"Wait!! Please don't shoot!"

he quickly says

"I'm not infected! This bite is two weeks old!!!"

he exclaims. That's impossible, isn't it? Everyone turns by the third day once they're bitten...