Trophy Description:Kill an infected teammate with a headshot before they become a zombie in any mode.
Trophy Type:Bronze
Best Farm Location: Literally anywhere with zombies.

This is a combat related trophy and it can be done either in Campaign Mode or Versus Mode. For the trophy, you must simply kill an infected teammate with a headshot before they become a zombie. You'll know when an ally is infected when the normal arrow icon above their head changes into a Biohazard symbol. Note that this symbol will also show whenever your AI or Human partner is grappled by zombies. Indicating a possible chance of them getting infected, simply don't help them and let them get infected. Then shot them in the head with any weapon with a precise headshot. The secondary weapon of the pistol will increase the chances of landing a headshot.