Editorial Commentary: Sexual Risk Behavior in HIV‐Infected Injection Drug Users

portant mode of HIV transmission worldwide. IDUs may transmit HIV not only by needle-sharing but also by unprotected sexual intercourse. Likewise, they may expose themselves to HIV through high-risk sexual behavior. In this context, IDUs may exchange sex for drugs or money to support their drug use. An important concern is the reports of increased sexual risk-taking among HIVinfected individuals, in particular among IDUs receiving HAART. Nonetheless, only a few prospective studies have investigated risk behavior for HIV transmission among IDUs. Active IDUs may not have the same access to antiretroviral therapy as do HIVinfected individuals from other risk groups, may seek less medical advice, and