The bisexually behaving men were only 40 percent as likely to be infected with HIV as the homosexually behaving men. The researchers propose that this is because the bisexually behaving men reported lower rates of unprotected receptive anal intercourse, the biggest risk factor for HIV transmission among men in the U.S.
The analysis also estimates that there are approximately 1.2 million bisexual men in the U.S., of whom 121,800 are HIV-positive. That estimate aligns with CDC estimates for HIV infection in male heterosexuals and intravenous drug users.
Dr. Friedman, who has conducted HIV prevention and research for more than 15 years, believes that while bisexually behaving men may have a lower risk profile than homosexually behaving men, their HIV burden still warrants the development of targeted interventions.
“The HIV infection risk that bisexual men pose to their female partners has likely been overstated,” said Dr. Friedman. “However, that doesn’t mean that HIV-prevention campaigns targeting bisexual men and their male and female partners aren’t needed. HIV does exist in the bisexual community, and national, bisexual-specific data collection, research, and HIV prevention and care delivery are necessary to ameliorate this population’s HIV burden.”