For Individuals Not Infected with HIV and Who Want to Help in the Fight Against HIVDr. David Ho and his associates conduct clinical trials in healthy, HIV-uninfected volunteers to develop potential vaccines to prevent HIV. We remain deeply committed to finding an HIV vaccine to help fight against the HIV/AIDS epidemic. We, along with others in the field, believe that a preventative HIV vaccine is vital to help decrease the infection rate of HIV/AIDS and help control the spread of HIV infection. Participation in HIV vaccine clinical trials provides opportunities for individuals to become involved in the fight against HIV/AIDS at a very personal level.