Inclusion Criteria

Participants may be eligible for this study if they:

• Are between 18 and 60 years of age.
• Are in good general health and meet laboratory test requirements.
• Have a CD4 count of 400 or more cells/mm3.
• Agree to use at least 1 of the following methods of contraception for at least 21 days before enrollment until the last protocol visit: condoms (male or female) with or without a spermicide, diaphragm or cervical cap with spermicide, IUD, or hormonal-based therapy (applies to women who are able to have children).
• Have access to a participating site and are willing to have follow-up for the entire study (12 months).
• Answer questions about their understanding of the study.
• Do not have hepatitis B or C.
• Are HIV-uninfected.

Exclusion Criteria

Participants may not be eligible for this study if they:

• Are pregnant or breast-feeding.
• Have recently received a vaccine.
• Have used experimental agents within 30 days before enrollment.
• Have received HIV vaccines or placebo in a previous HIV vaccine study.
• Have received blood products 120 days before HIV screening.
• Have received immunoglobulin (antibodies) 60 days before HIV screening.
• Have serious reactions to vaccines.
• Have problems with their immune system.
• Have cancer.
• Have used drugs that affect the immune system within the past 6 months.
• Have diabetes.
• Have a thyroid disease.
• Have unstable asthma.
• Are taking anti-tuberculosis drugs.
• Have seizures.
• Have a bleeding disorder.
• Have had their spleen removed.
• Have angioedema (a certain type of body tissue swelling).
• Have active syphilis.
• Have high blood pressure (unless controlled by medication).
• Have mental or emotional problems that make them unsuitable for the study.
• Have any medical, mental, or social condition; job responsibilities; or other responsibility that, in the opinion of the doctor, would interfere with the study.
• Have reactions to components of the vaccines.
• Are at high risk for contracting HIV.