I checked so I didn't misremember, according to the game (I don't count LoU2 as a sequel), the original cause was an infected crop with this fungas making into the food chain causing the mass infection.
So the FDA fucked up, tons of people got sick, they thought "Oops, better do a recall and it'll all be good" but then the infected turned into zombies and the FDA fucked the world over because they're shit at their jobs!
That's actually REALLY believable compared to 'mah global warming caused zombies', I'll admit I enjoyed the game as story was good plus multiplayer was fun, everything after the original game became shit though.
I checked so I didn't misremember, according to the game (I don't count LoU2 as a sequel), the original cause was an infected crop with this fungas making into the food chain causing the mass infection.
So the FDA fucked up, tons of people got sick, they thought "Oops, better do a recall and it'll all be good" but then the infected turned into zombies and the FDA fucked the world over because they're shit at their jobs!
That's actually REALLY believable compared to 'mah global warming caused zombies', I'll admit I enjoyed the game as story was good plus multiplayer was fun, everything after the original game became shit though.