The claim that HIV causes AIDS is based on the belief that HIV causes AIDS by killing the CD4+ T cells directly or indirectly after long incubation times (about 10 years), and the number of these cells will reach very low levels (<300/ µL) which leads to severe immune deficiency. People who have severe immune deficiency usually suffer from viral infections, bacterial, fungal and yeast infections. Certain forms of cancer such Kaposi’s sarcoma (KS) and lymphoma are also linked to AIDS.
HIV-free cases of AIDS are not new. They have been reported in the medical literature since 1986. Cases since 1986 have been verified to be uninfected over extended periods (6 months to several years) using ELISA, Western blot and PCR. Patients have developed low CD4 counts, Kaposi's sarcoma, disseminated candidiasis, disseminated tuberculosis, thrombocytopenia, and other opportunistic infections (Root-Bernstein, 1990, Pers. Biol. Med., 33:480). Cases matching the CDC surveillance definition of AIDS can also be found in the medical literature as far back as 1872, well before HIV is assumed to have emerged (Huminer et al., 1987, Rev. of Inf. Dis., 9:1102).
As of 1989, the CDC (Centers for Disease Control and Prevention) reported that 5% of all U.S. AIDS patients who had been tested for HIV to that time were HIV-negative. No figures have been reported by the CDC since 1989.
Source: Unexplained CD4+ T-Lymphocyte Depletion in Persons Without Evident HIV Infection -- United States
There is no doubt that AIDS is responsible for some tough experiences in life as it relates to health. But does the currently available evidence prove beyond reasonable doubt that a unique, exogenously acquired retrovirus has been isolated from the tissues of AIDS patients?
The existence of HIV-free AIDS (as per CDC report) proves that HIV is not a necessary cause of acquired immunodeficiency. This does not exclude HIV play a role in the majority of cases of AIDS, but may also mean that HIV is the primary immunosuppressive agent of AIDS.
If non-HIV immunosuppressive agents can cause AIDS in HIV free people, they can also cause AIDS in people infected with HIV. Essentially all patients with AIDS have several immunosuppressive risks simultaneously. Acknowledgement of HIV-free AIDS makes it untenable not to reconsider the idea that these measures are sufficient in themselves to cause AIDS.