Narration

Rating: Null/10 (29 June 2003)

I just saw this film again on TNT and it's the first time I ever heard it with narration. Someone introduces the characters at the beginning. The ending I remember is the two surviving characters staring at each other at night wondering if the other is infected. This ended in daylight with a "dog" running from the burning camp. Is this an altered version or am I just remembering this wrong?