I apologize for my brief absence. After a brief power outage, I was left with carrier pigeons as my only means of communication. And, as you may know, their html compliance is questionable at best.
Much to my surprise, I found that G4TV has done some excellent epidemiology of the various zombie outbreaks over the last few years. I present it to you in your favorite form.
I hope my own research into the field will bring about a better world. But for now, this should suffice.