Now, we all know that one day some of those undead bastards are gonna rise from their grave and start muckin' up all the shiny things we cherish. But who's ready for it? Maybe Jim in Alabama with a dozen rifles in his abode and the surrounding land covered in land-mines and bear traps, but the average joe is pretty much screwed. We're all so comfortable in our nice warm homes that when some jerk with half of his face torn off and a nasty infection comes knockin' on our doors, we wouldn't hesitate open them with open arms, straight into the slavering jaws of a zombie. Welp, there goes my jugular and oop I now hunger eternally for the flesh of the living! Tough break, kid, you were unprepared.
The cities are a deathwish. They'll be the first ones hit and are a haven for the members of the undead, whereas the countryside is much safer (for the most part). The military is pretty much cannon fodder despite all their heavy machinery and automatic weaponry, only adding to the danger of getting our arms chomped on. Keeping away from the city or at least staying in the outskirts is your best chance for survival. A floor or two of an apartment building is good for large groups of survivors as you can always keep the stairwell barricaded (to an extent so you can send out scavenging parties).
Pretty much what I'm trying to say is that if some scientist in a lab accidentally made some virus that reanimated the dead, then we'd be straight screwed, plain and simple. Our world would be lost to the undead menace and that'd pretty much be that. So stock up on your canned goods and ammunition people, because they're coming, it's just only a matter of when.
