StyleCoin said:
heart disease for example...
Jes, but hereditary diseases are the hardest to heal(require long workings + powerfull mage). I did read it somewhere on the jos site.
I think the most important thing is:
"To effectively heal, your soul must have power. This is accomplished through consistent power meditation.
Once your soul is powerful enough, healing comes much easier. "
https://www.satanisgod.org/www.angelfire.com/empire/serpentis666/Healing.html