The UN AIDS agency is grappling with previously undisclosed allegations of financial and sexual misconduct involving a whistleblower.
US surgeons have made a huge breakthrough which could potentially make donor organs more widely available to patients infected with the AIDS virus, by performing the world's first kidney transplant in which both the living donor and the recipient are HIV-positive.
Experts are extremely hopeful after a second man, who has subsequently been dubbed the 'London patient', was 'functionally cured' of HIV after undergoing a stem cell transplant.
A London man appears to be HIV-free after a stem cell transplant - a dangerous and risky procedure. It is the second such success after the 'Berlin patient', who is 12 years post-transplant and still free of HIV.