Teplan
From Memory Alpha, the free Star Trek reference.
The Teplans are a space-capable species from the Gamma Quadrant. Due to their resistance against the Dominion in the mid-22nd century, the Jem'Hadar infected the Teplans with a Blight that was incurable.
In 2372, Doctor Julian Bashir developed an inoculation that would prevent future generations from catching the Blight. (DS9: "The Quickening")
