I for one ponder the idea that whatever causes the other rare cases of warp sickness...for a reincarnated person, perhaps since her soul wasn't originally bound to her current body, it's not bound as strongly as a normal person's would be and the process of shredding her current body on an atomic level and reconstructing it again elsewhere might cause a rebound of sorts, which manifests in sickness? it could even explain indirectly why other people get sick too, though there'd have to be reasons their souls come loose, maybe too many near death experiences? cursed? in a world of swords monsters and magic that doesn't actually sound that unreasonable does it?