The former can be also used with a Perdo Vim version of DEO able to destroy demons/daemons causing a certain kind of illness. When you consider rebalancing of the rumours and illnesses being caused by demons and spirits you suddenly can act according to ArM guidelines and medieval feeling withouyt breaking any rules for permanent sutuff. You are affecting the demon, not the body. Getting the guy/gal cured is a side effect 
Cheers,
Xavi