Fostossa virus

From Memory Alpha, the free Star Trek reference

The Fostossa virus was an epidemic on Bajor while Crell Moset, a Cardassian exobiologist, was practicing medicine during the Cardassian Occupation of Bajor.

The incident was recalled by Ensign Tabor of USS Voyager. Crell allegedly used inhumane practices, things he called, "procedures that never would have occurred to me under normal circumstances." According to Tabor, Moset infected hundreds of unaffected Bajorans, including Tabor's grandfather and brother, with the virus to produce a cure. Thousands of people allegedly died in his hospital. He also didn't request any of the normal enzymes in eliminating viruses. A more damning piece of evidence came when it was disovered that there had not been an outbreak of Fostossa in the province he was practicing in until his experiments began.

Moset's research did provide a cure, however, and Fostossa was eradicated sometime during the occupation. (VOY: "Nothing Human")