The vast majority of HIV infections in San Francisco are clustered among the heavily gay male populated neighborhoods of The Castro, The Mission, Noe Valley, The Haight-Ashbury, and Pacific Heights.
Author’s note: There are currently restrictions on those wanting to travel to certain countries in West Africa because of the Ebola outbreak, yet – we are having our own epidemic among gay men in major US cities. Only, sadly, I consistently hear from proud parents of gay sons who are so happy and content that those same young men have now moved to San Francisco.