Class E is a provisional classification applied to field agents and containment personnel that have been exposed to potentially dangerous effects during the course of securing and establishing initial containment over a newly-designated anomalous object, entity, or phenomenon. Class E personnel are to be quarantined as soon as possible, monitored, and screened for potentially harmful changes in behavior, personality, or physiology, and may only return to duty after being fully debriefed and cleared by psychiatric and medical staff.