I beg to differ hysteric. If someone is talented in healing, the possibilities are endless. But the spells aren't where the ability to heal lies, it is within the person. I personally do not need nor desire words or ritual to heal small things. It's my knowledge of how to direct my energy. I was told since I was younger that I had a healers touch, and I just use my intuition most of the time along with knowledge of the way the body works and the energy therein. If you want to heal, the most important thing is to be able to see or feel the energy of someone's body and be able to find the root of the pain or illness.
So to answer your question Kjroni, in the hands of a healer, yes. But for large things, like chronic illness, the patient needs to be positive for it to have any effect. The state of mind of a chronically ill individual is already very imbalanced. This makes it difficult. The healer needs to help mind, emotions, and spirit before the body in this case. And if the one ill is willful to remain negative, they cling to their illness and there isn't much hope for them unfortunately.