"Its rare in history that you get such a coalescing of support spontaneously in the scientific community, and then you have a government who quickly comes forward and says they don't support it because its inconsistent with their policy," Wood said from an international AIDS conference taking place in Vienna.
"If this was a new breakthrough in diabetes or something that there was basically scientific consensus that the current policy was harmful, policies would get revised. But they're so rigid in their approach that it's obviously very frustrating."