Dr. Crell Moset was the Chief Exobiology specialist on Cardassia Prime, certified to perform all surgical procedures. Dr. Moset was currently the Chairman of Exobiology at the University of Culat in 2371.

During the Occupation of Bajor, Dr. Moset was practicing medicine on Bajor. Without the resources to try traditional methods, Moset experimented with procedures that never would have occurred to him under ordinary circumstances. As a doctor on Bajor, Moset found the simplest tool, such as scalpels, were the most effective as modern traditional equipment, they remove a doctor from his subject. It was by these methods that he accidentally discovered the cure for the Fostossa virus epidemic, saving thousands of Bajorans lives and for which he won the Legate's Crest of Valor.

What was unknown outside of Cardassia and Bajor, however, was the fact that all of Moset's experiments were performed on living people. Thousands of Bajorans were killed in his so-called hospital, including USS Voyager crewmember Ensign Tabor's brother and grandfather. Many of studies included experiments such as blinding his "patients" so he could study how they adapted or exposing them to polytrinic acid just to see how long it would take for their skin to heal.

Crell Moset's lab during the Bajoran Occupation.

The most horrific part of Moset's experiments was the method used to cure the Fostossa virus epidemic, which was accomplished by infecting hundreds of people so that he could experiment with different treatments. According to Starfleet records, Moset purchased many biochemical agents, including every known strain of the fostossa virus, a typical procedure in the development of vaccines, however, he didn't ask for any of the enzymes normally required for synthesizing a vaccine. Four days after he received the virus samples there was a minor outbreak of Fostossa in the vicinity of his hospital. Prior to that date there had not been a single case in the entire province.