There are basically two theories on the origin of zombies:
1) a cursed person dies and returns as a zombie, and
2) a person contracts a virus or is exposed to radiation.
Mummies are not usually regarded as zombies because while zombies are in a constant state of decay, mummies are deliberately physically preserved.
According to zombie lore, the only way to kill a zombie is to damage its brain or cut off its head
Rather than fighting zombies, you can embrace them.
According to Haitian folklore, feeding salt to a zombie will restore the person to freedom.
That doesn’t mean the zombie will become a living person again but, rather,
that the body will return to the grave.
There is a law in Haiti that makes it a crime to turn someone into a zombie. Article 249 states that if someone drugs another person, buries him as though he were dead, and then digs the person up and brings him back to life, it is still considered murder.
In the case of a zombie outbreak, a person’s physical fitness will have a significant influence on a person’s odds of surviving.
Zombies limp because their bodies are affected by decomposition
Zombies may have the trademark zombie limp because their bodies are affected by the same decomposition process as any normal corpse. Additionally, rigor mortis would cause serious tissue and muscle damage at the zombie’s each step. Since zombies do not regenerate or heal, any damage is permanent. Eventually, a zombies’ top speed would be reduced to a crawl and perhaps even slow to the point where it could not move.
According to the Voodoo religion, once a zombie has been created, the bokor, or the evil priest who created the zombie, must keep the zombie obedient by feeding it a paste made from a plant called the “zombie’s cucumber.” Legend states that chemicals in the cucumber keep zombies weak so they are easy to order around. In the United States, the zombie’s cucumber is called jimsonweed.
According to Haitian voodoo, there are several precautions people can take so that their deceased loved one can avoid being turned into a zombie: 1) bury the body under heavy stones so they are harder to dig up, 2) watch over the grave for 36 hours (after 36 hours, death is final and a bokor can no longer turn a dead body into a zombie), and 3) cut the head off the body.
George A. Romero’s 1968 movie Night of the Living Dead is universally credited as being the film from which all zombie movies today have their roots. In the movie, radiation from a fallen satellite brings dead people back to life?and they have an appetite for human flesh.
“It is a truth universally acknowledged that a zombie in possession of brains must be in want of more brains.”