from here:
http://www.walkingdeadforums.com/for...lypse-550.html
The link below is an actual, legitimate academic study performed by the University of Ottowa and Carleton University, and published in 2009. They aren't saying they think zombies are real, it was more of an exercise in predicting the spread of real infectious diseases. They thought zombies would be an extreme, and interesting, example of how rapidly a disease can become a global problem.
Link to the study:
http://mysite.science.uottawa.ca/rsmith43/Zombies.pdf
PS: "...These results assumed that the timescale of the outbreak was short, so that
the natural birth and death rates could be ignored. If the timescale of the outbreak increases, then the result is the doomsday scenario: an outbreak of zombies will result in the collapse of civilisation, with every human infected, or dead. This is because human births and deaths will provide the undead with a limitless supply of new bodies to infect, resurrect and convert. Thus, if zombies arrive, we must act quickly and decisively to eradicate them before they eradicate us."
If it happens according to the study we are more or less all doomed
