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What most sets "The Last of Us" apart from other zombie apocalypse stories is the zombies' oirigin. The "clickers" or "infected" are not shambling, undead corpses . Rather, the infection comes from the Cordyceps fungus, a real parasite which can infect ants and take over their bodies. In "The Last of Us," the fungus starts to infect humans.

The Cordyceps zombies are covered in fungal growths, with long-infected ones having heads that look like mushrooms. This makes "The Last of Us" infected even creepier than typical zombies. A virus that brings the dead back to life is almost assuredly pure science fiction. Since Cordyceps fungi are real, though, this apocalypse feels more plausible. The popularity of the original "The Last of

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