My cousin was an intern at UCSF in the mid-1980s, and in 1985 he told me that anal sex between homosexual men was and would remain the principle vector of transmission. This information was suppressed in lieu of the homosexual political agenda, at the cost of hundreds of thousands of their own lives.
Is there any reason to believe that anal sex between homosexual men is a more effective disease vector than anal sex between a man and a woman? My impression is that in Africa the latter is the primary disease vector.