Scientists reported that an antiretroviral drug prevented the spread of HIV in 1,000 sexually active homosexual couples, according to an eight-year study conducted in Europe.
The authors published their findings in the Lancet medical journal Thursday, Reuters reported. Researchers followed 1,000 couples, each composed of one HIV-positive partner and one HIV-negative partner. The couples were sexually active and did not use condoms during intercourse, according to the researchers. Despite a lack of protection, none of the HIV-negative men reportedly contracted HIV.