Michael A. Horst, PhD, MPHS, MS, joined the April 2010 ISDS Literature Review to present his recent publication, "Observing the Spread of Common Illnesses Through a Community: Using Geographic Information Systems (GIS) for Surveillance," from the Journal of the American Board of Family Medicine.The Literature Review Subgroup found this article particularly important becase it represents an initiative to link health risk mapping with cluster detection methods that many health monitors employ.