(covers information from several alternate timelines)
- You might also be looking for the Tarellian plague.
The Terrellian plague was a devastating viral infection, renowned for the excruciating discomfort its victims suffered.
In the anti-time future (c. 2395), experienced by Captain Jean-Luc Picard, the Terrellian plague had spread to Romulus. Only a few medical ships were allowed to enter to treat the victims. (TNG: "All Good Things...")