Gwion spent years searching for a cure for Vampirism. It even worked once.
The cure requires a strong desire on the part of the vampire to become human and enough soul left intact fighting against the vampiric taint. It takes months to prepare enough herbal salve infused with primal energy to cover the entire vampire. The vampire is then purified and gotten to drink blood infused with a spacial drug to induce a dreamlike state. The Vampire's living friends then dream walk into the Vampire's psyche to help her or him battle the taint and reknit the Avatar to the Soul. Once The contagion is beaten in the dream realm, they reemerge to reanimate the vampire and purge him or her from the physical taint. If they are vvery lucky, no one dies and the vampire is returned to the human state.