Nikon wrote...
I personally can't stand it. Overplayed and overdone. And not scientifically sound.
How about you?
Of course it's sound. Say a virus adapts to take over the brain. It can shut down most of the other functions while it rewrites the brain to help it reproduce itself. Example of rewrite, humans are always releasing pheromones even though they are unaware of it. These pheromones are used mostly for mating, but the virus, rewrites our brains to think instead of sex, food! The mouth is the most germ filled part of the body and so the bite makes the natural transfer of the infection from one host to the next. The virus is just found a way around all the drugs and such we have been using for years to kill it and adapts in a new way to spread itself. Sure the other affects are gruesome deaths and ravenous former humans, but that's what makes it sound. Also the pheromones are how the zombies find live people no matter where they go, you can't stop yourself from making them.