Who doubts that HIV causes AIDS?

By far the most significant scientist to question the HIV/AIDS theory is Professor Peter Duesberg, a virologist at the University of California at Berkeley, who first wrote about this topic in 1987. Throughout the 1990s and into the new millennium, as HIV/AIDS researchers announced many new discoveries and amassed huge volumes of data, Dr Duesberg remained unconvinced. He admits that HIV exists, but he maintains that it is harmless, and that AIDS is caused by non-contagious factors including drug abuse, malnutrition, and even the very drugs used to combat HIV.²

Other dissidents (often called "denialists" by their opponents) include the Perth Group of medical scientists and physicians from Australia. The Perth Group (led by Eleni Papadopulos) claims that nobody has conclusively proven the existence of HIV, so any proof that HIV causes AIDS has no foundation.³

Dissident arguments have received attention from the popular media, as well as from scientific journals. And with the rise of the Internet, alternative views have found a much wider audience, so that scarcely anyone interested in AIDS can have failed to hear of them.

Some of their followers are intrigued by conspiracy theories involving sinister drug companies or government persecution of minority groups. But alternative explanations can also appeal to those diagnosed with HIV or AIDS, who read that their condition might not be fatal, that they shouldn't take toxic drugs, and that unprotected sex poses no risks. Even a few AIDS service organisations have adopted non-HIV viewpoints.⁴

However, the proportion of scientists who doubt that HIV causes AIDS is tiny, and shows no sign of increasing. Interest in dissident views appears to have dwindled after the excitement surrounding Thabo Mbeki's AIDS panel and the Durban Declaration in 2000. It seems likely that new and better evidence, including the obvious benefits of modern drug treatments, has caused many former-dissidents to change their minds.