Elvish medicine is much different from human medical practices. Elves tend not to use procedures like needles or surgery but rely instead on various elixers to cure illness and injury. The physicians mentioned in the books include Elwin, introduced in Book 1: Keeper, and Livvy (aka Physic), introduced in Book 4: Neverseen. Magnate Leto's Dad was also in this field of study. Elwin is a Flasher and uses different coloured lights that he creates and special glasses to diagnose patients. Livvy must use special coloured candles are she is not a Flasher but the effect is the same. A common place to buy medicines is Slurps and Burps, owned by Kesler Dizznee. One unspecified type of medicine elves use is modeled off the smallpox vaccine humans made.