I often wonder if the genre is overdone, and I always come to the same conclusion. No. The problem is that we grow to think of one particular show or movie as defining that genre. The show or movie might get old, but all it takes is a fresh take and it’s new all over again.
Harvest blends the worlds of Boyle’s infected with Romero’s zombie. The slow zombie reanimates during rigor mortis, whereas the fast undead reanimate before rigor sets in, thus are capable of anything they were in life (as far as speed and strength) I don’t consider this to be a great innovation on the genre, however, I do feel the way in which the worlds are blended in the story adds a whole other element of fear to the traditional zombie story.