Quarantine lockdown

A quarantine lockdown is a means to contain an outbreak of a disease from reaching the general population. Atlantis has an automated system that detects and quarantines the infected but also allows people who are able to help enter the quaratine area. After a ionospheric disturbance, the city entered into a category five lockdown, which sealed every door in the city, disable all communications and activated a subspace distress beacon. When the city believed that quarantine had been broken, it activated the self destruct and disabled all computer access as well.