[Meursy]

@Hylobius

You can give a diseased commander a regneration item, and that will slow down the hit point loss quite a lot. Instead of losing 1hp a turn, you only lose 1hp a year, in Late Winter.

Also, if your diseased commander is low on hitpoints, a good trick is to bring them into a combat. They will regenerate back up to their maximum base hp eventally, depending on what that amount is and their regen rate.

As a side note here be careful if you're using the Lycanthropes Amulet to get your regen. If you send someone wearing that into battle they'll beserk and charge straight towards the enemy! It's the cheapest item to get regen however, the other regular options being a regen ring or hydra armour, both N2.

So in theory you can keep your diseased commanders alive forever, though it costs you in nature gems and micromanagement.

Regular units are pretty screwed however, unless you have some sort of healing unit available, the Gift of Health global enchantment, or The Chalice, which is a unique artifact.

I often pick out my most affliction screwed units and put them in front of my armies to catch arrows/lance charges.