Is aids still primarily a gay disease?

No.: Despite the early description of the disease (grid) as primarily involving men who have sex with men in the United States, more than 80% of infections occur through heterosexual transmission, and over 50% of all hiv-infected people in the world are women. Mother to child remains a significant mode of transmission worldwide. (clin infect dis 2007; 44:981).

Not that simple: Gay & bisexual men are most at risk, but many factors are involved. See the following for more information: http://www.cdc.gov/hiv/statistics/basics/ataglance.html

No: In Africa, it was always transmitted primarily among straights. In many communities, intravenous drug use is the main route. Anal intercourse is risky but the large majority of gay men do not do high risk stuff. It is practices, not orientation, that creates risk of course.

Yes and no: It depends where you are. In most industrialized countries, including the US and all of western Europe, the large majority of both new HIV infections and currently infected people are men who have sex with men. In most of the world, though, the large majority of cases occur through heterosexual transmission. In all areas, a minority are acquired through shared drug injection equipment.