There is no good plot to this movie. In addition to that, the First person shooter camera is really irritating in movies.. (you hear me movie makers?)
It looked like the director was just trying to make use of every possible content in a short time, so nothing was well executed.
It was panic everywhere and none of the character seemed to be doing its job properly (acting was good, talking about characters here). Though it had been long time the virus had started, they should have gotten bit used to it, but it didn't seemed like it. They were making every false call possible e.g. when any person gets out of the bus in middle of a town full of infected people, you close the damn door and wait for that person to come back. Instead they decided to keep it open and wait.. knowing none of them knows firing a gun properly.
Save your time and don't watch it. You will get aggravated on character's stupidity and wont be able to enjoy movie anyway.
Thanks for reading.