This entire group showed up throughout the course of the day displaying the same symptoms. They're remarkably similar to Dr. Peters' condition when he first came a week ago. I hope we don't have a contagion on our hands.”— Vault 22 terminal entries - Case 164 (group)
Kenneth Derrida was a Vault resident during the experiments inside Vault 22.
Kenneth Derrida was one of the first infected by the spores from one of Vault 22's experiments.
Kenneth Derrida is mentioned only in Fallout: New Vegas.