Zouden writes: A HIV-positive man in Australia convicted for having unprotected sex with three women has lost an appeal, after a judge rejected defence claims the virus does not exist. The man was was convicted on three counts of endangering life last January after one of the women, a mother of two, became infected with HIV. Defence lawyers called two Perth medical researchers who testified in court that the virus did not exist and could not be sexually transmitted. The judge dismissed the witnesses' testimony, saying the pair lacked credibility and were advocates for a cause rather than independent experts. Under earlier cross-examination, [one of the expert witnesses] was asked by the prosecution if she would have unprotected vaginal sex with a HIV-positive man. "Any time," she replied.