Hello,
I'm having an issue where after completing the Corprus Cure part of the main quest I still have Corprus disease. Not only is the icon still there but so are the effects (-1 and +1 to stats). Under the Resist Blight Disease effect is listed both Ability: Corpus and Ability: Corpus Immunity. So it seems like the Corprus Immunity was added without removing the Corprus effect. Is there a way to remove the Corprus effect? I tried talking to Fyr again but he says I'm cured and Caius advances on to the next quest as if I'm cured. This is pretty game breaking as everyone in the world treats me as if I have Corprus which ruins immersion. Any help is much appreciated.

This is normal. Corpus
This is normal. Corpus disease cannot be completely cured. The cure only removes the negative effects, you keep the positive effects like 100% immune to diseases.