different standards in different countries for interpreting WB; a positive WB in the United States may be a negative WB in Australia.? ?After twenty years, it is fair to ask how much predictive power the HIV theory has shown. The ultimate justification of a scientific theory lies in its predictive value. The HIV theory of AIDS theory has been a complete failure in this department. ?The epidemiology of AIDS is not, and has never been the epidemiology of an infectious disease. Despite the constantly expanding definition of AIDS, the heterosexual AIDS epidemic in the developed world, universally predicted by experts in the 1980s based on the HIV theory, has never happened, even though the heterosexual population does not use condoms consistently. In the developed world, AIDS remains confined to the original risk groups -- gay or bisexual men who engage in receptive anal sex with many different partners and drug users. Of the vanishingly small number of cases of allegedly heterosexual transmission of ?HIV? in the developed world, most do not hold up to closer investigation and are subsequently reclassified into one of the established high- risk categories -- if such investigation takes place, that is. Female to male sexual ?transmission? of ?HIV? has not been shown to exist at all, and male to female ?transmission? is tied to anal sex.? ?The sharp decline in absolute numbers of AIDS deaths in the mid-1990s that is usually attributed to protease inhibitors was already in full swing when protease inhibitors were introduced