CE04 - culture
The main cause of not cleaning up is imminent danger or an epidemic that kills them all. a secondary measure could also be to hide the settlement or bury it. so there are likely a few empty druid ruins beneath the surface.
Angels of Aurum 9 - Sector Zero
They had been suffering without medical aid because of an epidemic that swept through the place, and their government refused to acknowledge them because the epidemic was inadvertently caused by them delivering tainted produce, cheaply.
Zombie Crisis: Chapter Two: Lost Firearms!
In other words, while aggressive quarantine may contain the epidemic, or a cure may lead to coexistence of furs and zombies, the most effective way to contain the rise of the dead is to hit hard and hit often." alastar explained while smirking.
Supernova: Prelude, Arc 1, Chapter 1
We have had enough trouble stopping srg's attempts at unleashing sarin and vx, not to mention worrying about when the next epidemic will appear. we've been due for one these past few months." "i know, cayden. that's why i am shutting down the program."
Lone Wolf - Finale
A look of dark curiosity spread like an epidemic as the question of felan arose yet again. what had become of the omega, many wondered yet again. but now, more had the question of who was next? zen personally began pondering the order of the situation.
Overlord: Raise of Darkness Chapter 1 Bandits
For an epidemic the graveyard was too small for a city like that, and here wasn't a sign for a mass grave. for a catastrophe the buildings would be either newer or highly damaged. which isn't the case.
Information Age (A2, B1, C8)
One of my best men has learned that falcon is the origin of the strange epidemic that has been going around; if you recall, jon parker was the first to die from it. the people falling victim are not random. they're targeted.
Omatsuri
It was an epidemic, and a horrible one. incurable. nearly the entire village was wiped out, as well as others we traded to." his thumb crumpled the report in his hands. yomi remembered the voices outside were growing a tad louder.
Tonight The World Dies: Chapter Two
The reason such an epidemic would be released on the public is something i can only speculate on, however. connor, would you mind showing alastar to room 36? i'm going to... go see if i can't take care of something..."
- Celesteon - Reunion Arc - Ch. 9
My friend nurse joy told me about your new duty as the doctor to the pokémon of the forest; helping to quell that epidemic that suddenly appeared. i think that is very brave and noble of you." charles blushes.
The Legend of Spyro: Path of Delusions Book VIII Chapter 2
Our illnesses have the strength of small epidemics" he shook his head sternly.
- Celesteon - Reunion Arc - Ch. 12 - Finale
When the virus was becoming an epidemic, i started to worry about the pokémon in the forest. i remembered you were immune to the virus, so i thought maybe your blood had something in it that could help other create an immunity.