balance disease heal block

[Legebril]

Way too easy to inflict it upon low hp/fort/lvl characters, inability to quickly apply remove disease can kill you, especially if you are in the front.

It does not have a block timer like inflict wounds, can't just wait it out during kwest.
Potion drop is rare, tonic needs a heal roll.

Perhaps apply heal block on failure to resist disease effects or something and not on incubation period?