This is not a zombie movie.

Rating: 8/10 (11 May 2007)

First and foremost: this is NOT a zombie movie.
By definition, zombies are the reanimated dead. These people never died, so toss out all your ideas on how this was a "shit zombie movie" If you went into this movie with you expectations set too high, then yes, you will be disappointed. This is not comparable to 28 Days Later. First off, there is one major difference between the two. They have different directors. If you bought your ticket, expecting to have payed for an unexplained zombie movie, then you will be sorely disappointed, considering it's a perfectly explainable, and real, disease.. just not amplified to that magnitude in real life.
All of these so called "plot holes" that everyone has pointed out are actually explained quite well in the movie.. you just have to remember small details from the first, and pay attention to the second.
I give this movie an 8/10, I didn't walk into this movie expecting it to be this good, and in a way, it isn't comparable to 28 Days Later in the least. It is it's own film, and I think it does a good job of being an independent film, as well as a sequel.