Zombies defy all logic. How can someone who has been injured so badly that he can no longer live still, ehm… live? How can a rotting cadaver still stumble about and kill you? Why would it go after living humans in the first place? Wouldn’t it be easier if it just cooked itself a meal? Or go to Burger King: with a bad breath like that, they’ll surely let you go first.
Fortunately, there is no known condition that turns dead people into cannibalistic killer corpses. Usually, dead is dead.  Indeed, some of us have made it back to the land of the living, for example after reanimation in the hospital. But usually they don’t wake up with a particular appetite for raw human flesh, even though they have good reason for that, considering the food they serve in hospitals.
Yes, there are a few rare conditions that transform people into dangerous, raging psychopaths – the Indonesian disorder called ‘amok’ is the most well-known. But diseases like that have nothing to do with death nor cannibalism – and they aren’t contagious at all.