One of the first things that Naughty Dog wants to make clear in the development diary is that the infected are not zombies. Instead, they are the result of a fungal parasite inspired by a Planet Earth documentary the developers watched featuring a fungus taking over ants. This makes the infected a living but still deadly organism versus the dead and decaying zombies.
We're not sure if that makes much of a difference beyond semantics but it does allow Naughty Dog a little more freedom in how the infected creatures act in the game. The video shows the final stage of infection where the fungal growth on the human body essentially renders the creature blind. The only way for the creature to "see" is to emit clicking sounds like a bat using echo-location. The result should be some tense moments as Joel and Ellie maneuver around the game environment and try to distract the infected by creating noise elsewhere.
You can watch "The Last of Us" development titled "Hush" in our video gallery. The game is currently scheduled for a June 14 release. A demo will be included with copies of "God of War: Ascension" which releases in March.
Via: PS Blog