 1.Age 18 years and 50 years 2.Able to read, sign, and date the informed consent document 3. Available and willing to participate for the planned duration of the study 4.Are in good health, as judged by the investigator and determined by vital signs, medical history, and physical examination 5.Sexually active males must agree to use a medically acceptable form of contraception in order to be in this study and must agree to continue such use until day 30 after the last vaccination.Medically acceptable contraceptives include: 1 surgical sterilization such as a vasectomy, or 2 a condom used with a spermicide. Contraceptive measures such as Plan B TM, sold for emergency use after unprotected sex, are not acceptable methods for routine use. 6.Women of childbearing potential must have a negative serum pregnancy test at screening and a negative urine pregnancy test within 24 hours prior to each vaccination Not sterilized via tubal ligation, bilateral oophorectomy, or hysterectomy and still menstruating or 1 year of the last menses if menopausal 7. Women of childbearing potential must have used an acceptable method of contraception in the 30 days prior to enrollment and must agree to continue such use until day 30 after the last vaccination. Includes, but is not limited to, abstinence from sex with men,barrier methods such as condoms or diaphragms with spermicide or foam, effective intrauterine devices, NuvaRing, successful Essure placement permanent, non-surgical, non-hormonal sterilization with documented confirmation test at least 3 months after the procedure, and licensed hormonal methods such as implants, injectables, or oral contraceptives 