This will be a strange review. Objectively this is a terrible film. Two bland locations are used to portray a world over-run by vampire/mutants. There is no real context just a short voice-over by one of the main characters explaining that the world has been overtaken by a virus.
A film made on the cheap, with an appalling script written by a literate infant. At one point a key character is explaining to the others just how bad things are, at least that's what he says he is doing... In truth he is stating the obvious and in fairly mild terms. Later he is wandering around and runs into the vigilante group led by Seagal and he is told that luck is liable to run out! No sh** Sherlock, the guy is locked in a manky hospital with an army of raging mutants inside and out.
The acting is mostly okay, but Steven Seagal is so wooden it is hard to distinguish him from the scenery.Otherwise it's reasonable especially at some have no lines at all, aka attendants one and two :) There is horror and action in good measure but overall the film is a stinker. I wouldn't recommend it to anyone.
HOWEVER, I don't mind it. In fact I've seen it a few times. The score reflects an objective review not what I think entirely. I like the feeling of being under siege by ravening monsters, I quite like gory scenes and a bit of action. In this sense it's a fair effort for me,largely because I'm weird and easily pleased, but most people will undoubtedly hate it.