Quarantine

A TV reporter and her cameraman spend the night with an LA fire crew, responding to a routine 911 call at a small apartment building. They arrive to find police already on the scene, responding to blood-curdling screams from one apartment. The crew discovers that a resident has been infected by an unknown entity, leading to vicious attacks on others. As they try to leave, they find the building quarantined, with all communication in and out cut off. The only record of the terrifying events is the news crew's videotape.