Lyme disease is the leading cause of vector-borne infectious illness in the U.S. Learn whether you are at risk for the disease, discover how Lyme Disease is transmitted, identify the signs and symptoms, find out where Lyme Disease occurs most frequently in the United States, and view the recommendations for the Lyme disease vaccine. Developed by the Centers for Disease Control and Prevention, the Lyme Disease site provides a wealth of information on the bacteria, history, diagnosis and epidemiology. Also included are answers to frequently asked questions along with references to published works.