With our better understanding of Lyme disease, we now know it is not the "great imitator" of disease it once was thought to be. Limited, identifiable syndromes can be related to Lyme disease. Most of the disease's manifestations resolve without treatment. Treatment with standard antibiotics is very effective at preventing the development of long-term sequelae. The Lyme disease vaccine is safe and effective at preventing transmission of Lyme disease. Future improvements in the care of patients with Lyme disease should focus on identifying the etiology and most effective therapies for patients with posttreatment chronic Lyme disease syndrome, determining the safety and efficacy of vaccination in children, and developing second generation vaccines with improved efficacy and dosing schedules, possibly through the addition of antigens expressed in the human host.