I finished The Last of Us DLC today, good but too short!

So in this game the zombies are people infected by a mutated strain of Cordyceps fungus

Fungus zombiesWonder no more! After some Googling I found that Cordyceps is a highly prized edible fungus! Very popular in China, it supposedly cures all sorts of things.

And some images for references:
The Last of Us – Clicker Zombie
Real world Cordyceps