HIV infection is a significant risk factor for human HPV infection and the development of HPV-associated lesions in the female genital tract. Findings suggest that HIV infection and/or HIV-related immunosuppression increases a woman's susceptibility to HPV infection or alters the natural history of preexisting HPV infection. Treatment with HAART has been shown to result in significant increases in CD4+ cell counts and "partial reconstitution" of the immune system. It is not known whether treatment of HIV infection with potent antiretroviral regimens could affect the persistence of HPV infection and progression of cervical dysplasia. This study is important for HIV-infected women because of the implications for gynecologic management and determination of cervical disease risk.