- For other uses of the term, see Quarantine (disambiguation).
A quarantine is the act of enforcing isolation in an attempt to contain a dangerous element, such as disease, malevolent lifeform, or other dangers. An individual can be placed under quarantine, as can a ship, planet, or even an entire area of space.
In 2364, following the death of Tasha Yar at the hands of Armus on Vagra II, Captain Jean-Luc Picard placed Vagra II under quarantine to keep Armus from escaping the planet. (TNG episode: "Skin of Evil")
In 2369, when the aphasia virus was released on Deep Space 9, the station and all docked ships were placed under quarantine in order to keep the virus from spreading to Bajor or any other worlds. (DS9 episode: "Babel")
Later in the year station personnel on Deep Space 9 began constructing a quarantine module in order to be able to isolate people carrying infection on incoming ships. This module was converted into a space station for use at the Gamma Quadrant end of the Bajoran wormhole to monitor traffic and establish a Bajoran claim to the space around that end of the wormhole. (DS9 novel: Bloodletter)
In 2370 Beverly Crusher told Admiral Adams half of the crew of the USS Enterprise-D were under quarantine following an outbreak of Andorian measles. In reality the crew were perfectly healthy and Dr Crusher had made up the outbreak to provide cover for their investigation of a Starfleet conspiracy on Earth. (TNG comic: "An Inconvenient Truth")
In 2260 of the alternate reality, Captain James T. Kirk place Parthenon 559 under quarantine to avoid bloodshed between a Federation advance mining team and a group of peaceful Gorn.(TOS comic: "Star Trek, Issue 24")