- Star Trek: The Motion Picture
- Star Trek II: The Wrath of Khan
- Star Trek III: The Search for Spock
- Star Trek IV: The Voyage Home
- Star Trek V: The Final Frontier
- Star Trek VI: The Undiscovered Country
- Star Trek Generations
A virus whose infectious cycle takes 29 hours to complete. U.S.S. Voyager's Emergency Medical Hologram infected himself with a simulation of such a virus in order to set an example for the crew on how to withstand suffering. He was not able to deal with the flu symptoms himself, and feared he would die when Kes secretly added a few hours to the simulation.