I’m sure you’ve all been wondering, “Just where does Nathan draw the line delineating what can be considered a ‘zombie’ for purposes of the annual Month of the Living Dead?” That question has now been answered: it’s right between the 28 Days Later/28 Weeks Later movies and this one. Yes, both concepts have technically non-undead persons infected with a virus which has caused them to regress from sapience and individuality into murderous, animalistic rage… but the infected in I Am Legend (2007) can climb walls like Spider-Man. That is not in the zombie repertoire, no matter which canon you’re consulting.