MassBiologics of UMMS is sponsoring a research study of antibodies to Borrelia burgdorferi, the bacteria that causes Lyme disease. We are seeking healthy volunteers who are at least 18 years old and have previously received the licensed Lyme disease vaccine (LymeRx) or prior immunization with vaccine containing B. burgdorferi antigens. After consent volunteers will fill out a questionnaire & provide a blood sample. Compensation for time will be provided. Please contact (617) 474-4444 or LymeAntibody@umassmed.edu.