I fear I've never bothered with the DFhack stuff, so that's not an option for me.
...And it's all come to a stunning conclusion anyhow. The Werepanda Cascade in the year 256 was larger than expected, and rather a lot of dorfs died. I trapped a whole bunch of children in a back room when they turned out to be all Werepanda Children. They fought to the death, the Baroness went around killing the other adult werepandas in the bedrooms, another one transformed whilst working in the smithy and killed the coalburners, and there was an "incident" in the kitchens. It's all over: No more infected. I have about ten normal dorfs cleaning up the blood all over the fort, the Baroness dead (but not able to be put in her coffin in her tomb, because she was a werebeast when she died, and it doesn't work that way) and the vampire mayor dead of coral forgotten beast dust in the walled-off caverns, with about four pieces of Artifact armour and an Artifact bone sword.
The fort will still never die: The final remaining werebeast child has grown to adulthood, in a walled off room scattered with the remains of other werebeasts, blood, and puke. He will live forever. Add to that the migrants who have already started arriving. They then possibly really doubted their decisions when they saw the sixty torn and dead bodies, the layers of accumulated blood, and the rotten miasma-pumping wardogs in the kitchens (One of the cooks was not only a dog trainer, but also, it turns out, a werepanda) but hey, it helps to have more dorfs to start shifting bodies and scrubbing staircases.
The patient who was scared by the Duchess? He's still around. He fought a werepanda off using a lovely iron pick at one point, and he's still suffering from injuries, but he's not infected, so he can go on to tell the tale of how the Duchess transformed when he was a patient. I don't think he'll ever seek help for his injuries. He just doesn't trust doctors...