Virek was a Vulcan in the 24th century. In 2375, Virek was the doctor aboard the Damask Plain, a survey ship that picked a disease that killed Vulcans. Virek would die from the disease but left behind her notes which hypothesized that the Dominion had created the virus and the ship's all Vulcan crew was exposed while on their expedition. (DS9 short story: "Mirror Eyes")