Could A Zombie Apocalypse Actually Happen?

Could A Zombie Apocalypse Actually Happen? 
Usually this is something that people only have to worry about in horror movies, but could a zombie apocalypse physically happen in the real world? Admittedly it is not something that should keep you awake at night, but we wondered whether it is scientifically possible for our world to become infected with a zombie virus. With this in mind we set about asking some of the world’s leading zombie experts their opinion on how likely it is to expect a zombie invasion to reach our shores. An illness also known as bovine spongiform encephalopathy, or BSE for short, Mad Cow Disease is a virus that attacks a cow’s nervous system, causing it to act strangely and lose control of its natural ability to do normal things, essentially becoming mentally ill. The infection causes a cow’s brain to waste away and is believed to come from contaminated food given to cows. David Youngquist, president of Dark Continents Publishing, said: “A zombie apocalypse could happen. I’m honestly surprised something like this hasn’t happened already.

Being that people are already acting irrationally, how much would it take for a virus like Mad Cow or Rabies to mutate and infect the brains of humans on a massive scale?