system
Given the following post, respond as if you're commenting on Reddit:
human
[Dawn of the Dead 2004] is there anyway anyone could actually survive this long term?

Fast zombies seem impossible to survive personally. 

As a bonus, what would the walking dead universe look like with the exact same rules (everyone has the virus and comes back after death) but as fast zombies.
gpt
If someone was dug in at a location where a fully functional but bare-handed human couldn't force entry, they've got a fighting chance in the short term. That said, the backbone of American commercial and government logistics has been shattered; anyone not equipped to produce their own food (or take it by force, a la the residents of Fiddler's Green in Land of the Dead) has a ticking clock over their head, and once that clock hits 'zero', their options are A) do something desperate/stupid or B) die. 

The people with the best shot at long-term survival are folks with a little patch of rural nowhere, far enough off the general radar that they won't be swamped by people fleeing the cities, with enough natural defenses to either cut off a horde entirely or bottleneck them in a manageable fashion, and enough water and crop growing land to maintain a population. If they can keep their heads above water for a few years, a few hard freeze/thaw cycles can bring the undead numbers down to levels that would permit a re-establishment of outside trade and salvage.

If Walking Dead was done with fast zombies, they'd have to change the name of the show/comic to "The Completely Dead". Rick likely would have been killed during one of his earliest encounters with the dead, and most of the other protagonists wouldn't have done much better.