Quarantine is an English language remake of the Spanish film REC, which was produced with a lower budget but higher box office returns. Both films used a handheld documentary style that was popular at the time among horror films like Cloverfield. Screen Gems, a subsidiary of Sony, distributed Quarantine to capitalize on the success of REC and meet demand for an English version, as REC's subtitles had limited its international success. By remaking and distributing the film, Screen Gems and Sony were able to maximize profits through vertical and horizontal integration.