A planet in the Gamma Quadrant whose people were infected with an incurable plague by the Jem'Hadar two centuries ago as punishment for defying the Dominion, the setting of The Quickening.
In The Quickening, set in 2372, Bashir, Dax and Kira answer a distress call just outside Dominion space and find a ruined civilisation. Everyone on the planet is born with the Blight, which shows as lesions on the skin and may quicken, bringing an agonising death, at any age.
The people have lost all hope of a cure. Their most respected figure is Trevean, who runs a hospital where those who have quickened are given a poison so that they can die peacefully among friends.
Bashir, confident that he can succeed, sets up a clinic with the help of a pregnant woman named Ekoria, but the fields from his instruments make his patients worse. He stays on alone and finds that his treatment, though it cannot save Ekoria, acts as a vaccine, since her baby is born free of the disease.