You also get lots of people making stupid mistakes, which I think a world of caution would be the rule in a more realistic situation. But such is the way of horror movies. The rage virus works the same, though the zombies seem a little smarter in this one, as well as the use of a large apex alpha zombie that is a presence that helps define this movie. It does stand apart from the other films rather than just being a sequel. The protagonist is a young boy trying to save his mother, which adds a more emotional element, as he learns the hard lesson that this kind of life would bring.
The wheel is not being re-invented here as the first movie is obviously going to be the most original, but I think I like this better than the second film, though it did drag some at the end, and the ridiculous ending with the Scandinavian acrobatic ninja was silly..It felt like it turned into "Kung Fu Hustle" all of a sudden. It was an odd choice. If you are a fan of zombie movies, you are not going to need me to sell you on this. I do not normally like zombie movies can name ten that are my favorites of this sub-genre, not sure if this one makes the list, but it is well made and entertaining.