Evaluating the Safety and Immunogenicity of an HIV Vaccine (gp145 C.6980) in Healthy, HIV-Uninfected Adults in the United States

The purpose of this study is to evaluate the safety, tolerability, and immunogenicity of an HIV vaccine (gp145 C.6980) with aluminum hydroxide adjuvant in healthy, HIV-1-uninfected adults in the United States.

This study will evaluate the safety, tolerability, and immunogenicity of an HIV vaccine (gp145 C.6980) with aluminum hydroxide adjuvant in healthy, HIV-1-uninfected adults in the United States. Participants will be randomly assigned to one of three groups. Participants in Group 1 will receive 300 mcg of gp145 C.6980 and aluminum hydroxide adjuvant on Day 0 and Months 2 and 6. Participants in Group 2 will receive 100 mcg of gp145 C.6980 and aluminum hydroxide adjuvant on Day 0 and Months 2 and 6. Participants in Group 3 will receive placebo on Day 0 and Months 2 and 6. Study visits will occur at Day 0 (study entry), Weeks 1 and 2, and Months 2, 2.5, 6, 6.25, 6.5, 9, and 12. Visits may include physical examinations, blood and urine collection, HIV testing, risk reduction counseling, and questionnaires.