This zombie film stands among the very best in the genre, notable for several groundbreaking elements. It’s unique because it provides an actual explanation regarding the origin of the zombie outbreak. The movie also pioneered the concept of a rapidly moving group of infected individuals, which greatly increases the suspense. Another innovation is how quickly people become infected—within mere seconds. The film's musical score is exceptional; its quality is comparable to iconic soundtracks from films like "Halloween" and "The Thing." It’s remarkable how effectively music can enhance both a movie and individual scenes. A significant drawback, though it wasn’t something the filmmakers could have anticipated, is that the picture was filmed in standard-definition video, making it difficult to view comfortably on today's high-definition or 4K televisions.

Source on TMDB