In the 1990s, a 60-year-old man who consulted him appeared to have developed all the hallmarks of a patient with AIDS. Yet, three tests performed at different clinics confirmed that he was not infected with HIV.

For many years, the patient had worked as a flight engineer, where he had been chronically exposed to organic solvents and aviation jet fuels. As a result of this exposure, he’d developed fibrosis of the lung, for which his doctor had prescribed the steroid prednisone and a two-week course of azathioprine, an immunosuppressant. When this treatment was changed and the drugs tapered, the man’s T-cell counts more or less returned to normal.

When this patient was later treated with another drug for a minor joint problem, his T cells dipped again. At this time, it took four months to bring his T-cell count back to normal.

As it became clear to Dr Al-Bayati that the prescribed drugs might be responsible for this patient’s depressed immune system, he began to think about the number of drugs used in modern medicine which are actually immunosuppressive agents.

This prompted Dr Al-Bayati to em-bark on a massive review of the medical literature and, subsequently, to carry out his own study to find out whether the use of certain prescription drugs - in addition to other lifestyle practices - might actually be causing AIDS.

Dr Peter Duesberg, professor of molecular and cell biology at the University of California at Berkeley, was one of the first to challenge the AIDS-virus hypothesis. Instead, he put forward the alternative theory that AIDS is brought on by the long-term consumption of recreational drugs and/or AZT (zidovudine) itself, a drug that is prescribed to prevent or treat AIDS.

Dr Al-Bayati’s work carries Duesberg’s theory further with the shocking suggestion that prescription drugs, particularly steroids, may be the major cause of AIDS.

The HIV (human immunodeficiency virus) hypothesis says that HIV causes AIDS by killing a person’s T cells - directly or indirectly. After long incubation periods (about 10 years), this slow-motion process causes these cell numbers to reach very low levels, leading to severe immune deficiency (CD4-positive T-cell counts of less than 200/mL). Such patients then usually begin to suffer from opportunistic infections (viral, bacterial, fungal, yeast and/or parasitic) and certain forms of cancer, such as Kaposi’s sarcoma and lymphoma.

If HIV were indeed the cause of a precipitous decline in T cells, it follows that treatment with antiviral drugs such as reverse transcriptase inhibitors (AZT) or protease inhibitors would delay the progression of AIDS by preventing HIV replication in the cells (Sci Am, 1987; 256: 46-56).

Yet, there is no clinical or laboratory evidence that HIV has the ability to kill infected T4 cells. Furthermore, the AIDS hypothesis only covers the destruction of T cells, whereas patients with AIDS often show up with many other types of disorders.

One laboratory study of HIV could find no evidence of T-cell death after being infected with the virus in tissue cultures. Indeed, the T cells were healthy and continued to function for more than four months after inoculation with HIV (Science, 1985; 229: 1400).