Source Picture How to become a zombie Zombie intelligence Zombie speed How to destroy a zombie

George A. Romero (Night of the Living Dead and sequels) Anyone who dies, no matter the reason, becomes one. A zombie bite makes the victim die after a few hours Mostly instinct and memories, though some later zombies are able to learn and reason (rudimentarily) Slow (rigor mortis) Destruction of the brain

The Return of the Living Dead Contamination from a gas, which also remains inside the zombies' bodies, and can turn even old corpses into zombies Human-like: can cooperate, make plans, and talk Human-like Total destruction; even burning still releases the gas from the corpse, which can create more zombies

Shaun of the Dead Zombie bite: kills after a few hours, then causes reanimation Instinct and memories Slow (rigor mortis) Destruction of the brain

Resident Evil Zombie bite: kills after a few hours, then causes reanimation. Also, contact with the T-virus Instinct; some smarter zombies exist Slow (rigor mortis); some faster zombies exist Destruction of the brain; some more powerful zombies exist

Zombie Survival Guide / World War Z Zombie bite: kills after a few hours, then causes reanimation Instinct only Slow (rigor mortis) Destruction of the brain

28 Days Later Any contact with infected blood; victim turns into an "infected" in seconds Instinct (aggressive rage) only Human-like; higher endurance Anything that would kill a human

Dawn of the Dead (remake) Zombie bite: kills after a few hours, then causes reanimation Instinct only Human-like Destruction of the brain

Autumn World-wide plague kills more than 99% of population in hours; a third of those reanimate after a few days Animation only at first, then instinct, and, later, possibly some intelligence Slow (rigor mortis) Destruction of the brain

The Walking Dead Anyone who dies, no matter the reason, becomes one. A zombie bite makes the victim die after a few hours Instinct only Slow (rigor mortis) Destruction of the brain

Marvel Zombies Zombie bite causes death and reanimation in seconds Full intelligence, memories, skills, and powers (if applicable) from previous life, but complete lack of morality; feeding is now the only goal As in previous life Destruction of the brain

Resident Evil 4 (Ganados only) Infection by "Las Plagas" parasite Human-like, including memories (but with obedience to "Las Plagas" queen's host) Human-like Anything that will kill a human, but, as they seemingly feel no pain or fear, more damage than normal is needed to stop one