The young mountain sheep came charging up the trail and into the Meadow of the Elders, past the startled Elder-Guards, and stopped, panting and half incoherent. “Relax,” came a deep, amused voice in his mind. “Take a deep breath, and then share your thoughts with us.”
“Yes, Revered One.” He took the deep breath advised, then trotted forward and touched his head to that of the Elder.
Pick up a pathology/microbiology book, and add the diseases/syndroms to your game. Your players will freak out.
Coughed at? Diphteria. or tuberculosis?
Drunk from a muddy stream? Or just walked through? Well, let us introduce you to schistosomiasis...
Hit by a stream of energy? Too moch mana is ust like too much radioactivity - perhaps all mages could develop cancer early if too powerful...