It’s not really a zombie film. While zombies do appear, the story isn't centered on them; they serve as a device to emphasize certain aspects of what’s happening. That approach is certainly noteworthy, yet my expectation was for something more frightening and suspenseful—instead, it proved to be quite somber and reflective. The movie delves into significant elements of human nature, but ultimately I would have preferred a straightforward zombie film.

Source on TMDB