Cure disease, or each cleric his own drug

Whenever cure/remove disease is cast, the target must make a CON-save.

If failed, the disease became (or was already) resistant to this particular cleric/normal person's version of cure/remove disease. The diseased individual still suffers from the disease, and may only be cured by another person but this time with a penalty (+1/-1 or similar). The penalty accumulates.

(Antibiotic resistance is serious problem, people!)

The contagious healer

There's a involuntary hermit hiding in the mountain range, silently creeping and crawling the crags. Through his eyes and hands leaks the power of healing; a simple touch or gaze or phrase makes the pain go away, though he cannot restore the loss of something once cut off - a lesson learned when they took his tongue (later sold as the relic Unsung).

Feline plague doctor

• Believes cats carries diseases
• Wears a porcelain mask and priest robes
• Wears red leather gloves
• Wields a long staff with an iron, hollow head on one end, that contains catnip and belladonna. Touching cats with the staff is believed to neutralize the disease for half a day
• Killing a cat is forbidden, as it will release the disease - it is better for it to be contained within the cat and neutralized
• Prays twice a day by repeatedly saying gatto morbus conrigo, and purring
• Never removes its mask, which is why most people suspect they're only part human

Short note to self: the flesh of zombies

What if zombiism were a disease that made you...

1. Slow as a turtle
2. Afraid of people
3. Tough as granite
4. Naturally long lived
5. Hunted for your flesh as it's believed it can cure diseases when digested

These zombies would eventually look like half-eaten corpses as people would try to chip of pieces of "medicine" from your body.

A case of the von Hohenheim

Anyone struck with this fever needs to seek out herbs and plants that resembles different parts of the human body, in order to cure that particular part.

Failure to do so may or may not end up with that part being replaced by the very herb he or she needed in the first place. This is referred to as the von Hohenheim-irony.