Land of the undead
Humanity is a difficult species to kill off.
Even when the world ends, there will always be the few whom survived.
Preppers, whom were called 'crazy'... not that anyone is calling them that anymore.
The rich, already owning themselves a cruise ship, loaded to the brim with the supplies needed to survive for some years.
And those whom just got lucky. The ones whom happened to survive, whether by coincidentally being near a place that would be turned into a survivor base when it all hit, those whom just happened to stumble across a weapon which would keep them alive, and even those whom the undead just passed up in favor of a different meal.
Whatever the case, we all made it this far... not that it matters. We are all going to die anyways.