This film proved to be quite good, although it does have some dark elements; certain moments could potentially upset those who are easily disturbed, as warnings suggest. Even for someone accustomed to zombies and science fiction, the impact is altered by the knowledge that these events are rooted in actual occurrences. It’s unsettling, but handled with a degree of sensitivity, serving as a good reminder that while sci-fi often portrays monsters from beyond our world, the truly frightening ones are more likely to be people we encounter every day. A strong movie overall, though the plot's unexpected turns were somewhat predictable, it was still enjoyable to see how everything played out.

Source on TMDB