[X] Obtain more test subjects when the chance arises in the future.
-[X] Limit it specifically to prisoners who would have been slated to be executed anyways. This is simply making better use of resources. And a lot less likely to come up on an investigation.
[X] "These gangers spent their lives preying upon their fellows, taking lives for their own gain, and stealing resources meant for everyone. It is only right that they spend their deaths bettering the lot of their community, to give back what they can in what we can learn from the studies."
-[X] "Furthermore, think about the great difficulties in pathology studies. Animal studies are inaccurate, they don't demonstrate the same symptoms or react to the same drugs, only a loose approximation. Gathering the already infected from the population misses out on the crucial knowledge of the incubation period and early symptoms. Asking for volunteers would be a most heinous waste of innocent lives."
-[X] "So we use criminals, those who are to die for their sins upon their fellow men. Their death is already inevitable, whether to the Arbites, to their fellows, or to a greater good."
-[X] "People are dying out there, because we cannot identify how to detect a disease before it becomes deadly. The pox spread so quickly, partly because people did not know what the early stages look like, and they spend a great deal of time hiding these signs for fears of being purged. To be kind to the innocent, the guilty will suffer in their stead."