In the article below a high school student was able to obtain data from state epidemiology boards to create maps of MS and Lyme disease. Spatial Patterns of Disease Inspire New Ideas on Possible Causes By Susan Harp, Esri writer http://www.esri.com/news/arcwatch/1007/spatial-patterns.html Excerpt from the 2007 article: "The two disease distributions were pretty similar-they correlate and the control doesn't," explains Blewett. "Biochemically they are also very similar, so it has just taken off from there." She hypothesizes that both diseases may share a common spirochetal basis and MS might develop from a secondary tick bite.