The Vidiians were a species found in the Delta Quadrant. For two millennia the entire race suffered from a disease called the Phage that ate away at their DNA and organs. The Vidiian government is called the Vidiian Sodality.
Continuous organ transplantation led to the Phage-infected Vidiians having a wide variety of alien organs and skin on their body, resulting in a hideous appearance. When uninfected with the Phage, the Vidiians had a standard humanoid appearance. The Vidiians' facial appearance was similar to that of a Human with two eyes, a nose and a mouth, but they also possessed a swept back hairline and a slightly enlarged forehead with no eyebrows. There was also a slight ridge that ran from the hairline down the center of the forehead to the top of the nose.