- Wilshire the fire dog also featured in an episode of "Dog Whisperer with Cesar Millan" (2004) (Season 3, Episode 4)
- In October 2008 Knott's Berry Farm theme park in Buena Park, California, had a Quarantine-themed walk-through "maze" for the park's 36th annual Knott's Scary Farm Halloween Haunt. It was their third movie-themed Halloween Haunt maze, after Beowulf and The Grudge 2.
- Remake of the Spanish movie [Rec].
- Was not screened for US critics.
- Unusually for a Hollywood production, this film does not feature a musical score.