I might have one about the buildings flavor texts : maybe there could be one when inocculated, and the second one (just before loosing them) could be a follow up. Adding a little bit story telling to it.
(I used a similar technic in a game I made https://rature.itch.io/jiayou-memovirus . In that exemple, the text tell a part of the story, and depend on the level. But it could be random too...).
Also, these texts could depend on the building's nature.