A 2012 case of HIV infection reported in Houston shows that despite being rare, transmission can occur during sex between 2 women.
The woman who acquired HIV was 46 years old and had been in a monogamous relationship for 6 months with a woman who was HIV positive. The patient had a history of heterosexual intercourse, but not for 10 years before she was diagnosed with HIV infection. She had 3 female sex partners in the 5 years before her exclusive relationship but hadn’t used injection drugs; gotten a tattoo; had acupuncture, transfusions, or transplants; or engaged in any other recognized HIV risk behavior (Chan SK et al. MMWR Morb Mortal Wkly Rep. 2014;63:209-212).
Rare Case of HIV Infection. JAMA. 2014;311(19):1959. doi:10.1001/jama.2014.4812