In reality, there are so many reasons why a Zombie apocalypse would fail to take off it's not even funny... I mean, for example, they are dead, frail, slow, don't think, and can't defend themselves, whereas people are living, stronger than zombies, quick, can think and plan their attacks, and can defend themselves. 10 people with melee weapons could easily take out 100 zombies, so long as they were smart about it. Not too mention we living have something called "military forces" which could take down thousands of zombies in a short amount of time.

Don't get me wrong, I like Zombie movies and all, but if a Zombie outbreak ever occurred in real life, it would likely be over rather quickly, and it would have killed much less people than is portrayed in movies.

To understand more as to why a Zombie outbreak would fail, read this...