Have you noticed this?

[MancheeLivesOn]

I'm going to question the longevity of the outbreak. Sure it's worldwide but there's only a limited food supply since and will only reduce their numbers with canabalism. They need to eat and sleep so they are indeed 'alive'. That being said they have no means towards a second generation aside from the Little Ones. They mentioned that all food expires in two years and with the dwindling supply of humans to feast on zombies will exhaust any food left to scavenge and cut the two year timer short. Plus winter is coming up and from what I can tell most of these zombies have no self preservation instinct. Zombies will freeze over the winter and all that's left are some of the smarter ones who holed up for the winter and any Little Ones they may create.

(Not all of this is fully thought out or coherent/in order but I figured I might try and spark an idea in someone.)