[Tiva]

Assuming that yes. But if it doesn't by the rate of decomposition with the rate of growth of the population adding in for the lack of food after a certain point and turning to cannibalism. The equator would be free of Zombies in 10 years, the polar ice caps in 2 (Lack of food driving them to move to warmer weather). So Canada & Alaska upper areas should be free to resettle in 3 years lower US in 7.
We actually did this in my Stats class.... well I did for my final project.