Infection

Stop! It's painful just looking at you! Some people already look better lying in their coffins... This is a... plague!
And you! Oh great Sarn! Another one! Quick! To the doctor!
Grigori is a well-known diagnostician. He promised to find the cure. Go straight to him, and don't lose another minute!

Hey, what's this? Idiots! I warned you! Don't go wandering around the ruins! Stay away from the corpses! Truly, as Sarnaut's population is increasing, its intellect stands still!

What's that? You're a corpse, that's what! Well, not yet, but you will be. You can crawl off to the barracks and sew yourself a burial shroud. Congratulations! The infection has reached you too.