"In actual reality" is why I find the film Maggie appealing. The whole zombies are dead people, who are dead but undead now, yet are still somehow hungry and not really dead-dead until their brain is punctured, then they're dead-dead has always been somewhat foolish to me.
Treating "the turn" realistically in Maggie like severe rabies that happens to you when you're still alive is much more intellectually satisfying.