The Toli-X vaccine was created against the Toli-X virus shortly after the virus appeared around 54 BBY and contaminated many planets. Though lethal to Humans if untreated, the Toli-X infection could be cured by the vaccine.
Appearances
- Jedi Apprentice: The Fight for Truth (First mentioned)
Sources
- The Complete Star Wars Encyclopedia, Vol. III ("Toli-X virus")