Dose Ranging Safety and Efficacy of Therapeutic HSV-2 Vaccine

This is a randomized, double-blind, factorial study to compare the reduction in viral shedding among 6 different combinations of GEN-003, a therapeutic HSV-2 vaccine and Matrix-M2 adjuvant. Secondary objectives of the study include: * Evaluation of the safety and tolerability of GEN-003 in combination with Matrix-M2 compared to placebo. * Comparison of the impact on clinical Herpes Simplex Virus type-2 (HSV-2) disease among the 6 different combinations of GEN-003 antigens and Matrix-M2 adjuvant measured by: * Time to first clinical and/or virologic recurrence, * Proportion of subjects who are recurrence free at 6 and 12 months after the last dose of vaccine, * Lesion rate (percent of days with genital lesions present) during the post-vaccination swabbing periods. * Evaluation of cellular and humoral responses to GEN-003 antigens. Additional objectives include: * Assessment of the correlation between immune responses and change in viral shedding or impact on clinical disease as defined above. * Determination of the recurrence rate in a subset of subjects not receiving suppressive antivirals throughout the study. Eligible subjects will enter a baseline period to collect anogenital swabs for 28 consecutive days prior to randomization. Each subject will receive up to 3 doses at 21 day intervals. Subjects will be followed for safety and immunologic response for 12 months following their last dose.