Best defense or cure against disease?

[Rytek]

Ive noticed that some units which change during battle will heal afflictions. For instance, Sorcerors from Machacka. If they are diseased from being old you can send them into battle by putting them up front, when they "die" and turn into their big spider form, they can get rid of afflictions. Same as any of them that change. Lama's, Jaguar warriors, skinshifters, etc.