Dead and Deader (2006)

Anytime the cover to a movie says "Dean Cain" and "best zombie movie so far this year" you've got to make the assumption that either they are lying, or the movie was released on January 2nd.

Lt. Bobby Quinn and his unit are blown up on a mission. Quinn wakes up in the morgue and finds that he is, by all medical analysis, dead and there is a strange little scorpion under his skin. He manages to remove the scorpion before it turns him into a zombie, but the rest of his unit are not so fortunate and run amuck, killing indiscriminately. Quinn is a responsible leader and feels he must make sure his unit is contained before they infect the entire region.

Turns out the scorpions are a government experiment (aren't they always) done by a rogue scientist who has cancer and is trying to develop a way to keep from dying. As usual, top secret experiments go terribly wrong and everyone dies. Booo! Bad movie, bad movie!!