Inclusion Criteria

You may be eligible for this study if you:

• Are 18-60 years old.
• Are willing to use adequate birth control for 1 month before study entry and during the study.
• Have a CD4 count of at least 400 cells/mm3.
• Have a normal medical history and physical examination.
• Are available for 3 months of follow-up.
• Have participated in AVEG Protocol 014C or 022A and received all the scheduled vaccinations 24 or more months before this study, or have never participated in HIV-vaccine studies.
• Are HIV-negative within 8 weeks of study entry.
• Are negative for hepatitis B surface antigen.

Exclusion Criteria

You will not be eligible for this study if you:

• Are pregnant or breast-feeding.
• Have a history of an immune system problem, any long-term illness, or any autoimmune disease.
• Have a history of using medications which affect your immune system.
• Have a history of cancer, except if it has been removed with surgery and cure is most likely.
• Have a medical or mental condition which interferes with the study.
• Have a job or work which interferes with the study.
• Have ever attempted suicide, thought of attempting suicide, or have a severe mental condition.
• Have received vaccines within 60 days of study entry.
• Have used experimental drugs within 30 days prior to study entry.
• Have received any blood products, such as immunoglobulin, in the last 6 months.
• Have active syphilis.
• Have active tuberculosis.
• Have any history of severe allergic reactions, including reactions to vaccines.
• Have an allergy to egg products or neomycin.