Infected Survivor

 is one of the variants of Zombies. Probably just a normal citizen who got infected by the unknown virus and turned into a zombie.

Combat
These Zombies are normal zombies with not a whole lot of HP or strength, but like all zombies they can stun you and cause trouble in groups. The Infected Survivor can spawn anywhere and is usually found in Day 7 hordes.

During the night, the running behaviour is the same as all other zombies. If distance or sheer zombie numbers aren't a concern, scoring a headshot when it's running towards you can be slightly easier.

This Zombie has erratic head movement, making it hard to headshot. It is best attacked in stealth as he moves less erratically when not pursuing a target.