Few large-scale population-based studies have been done on HIV among this diverse group of people. There is a lack of population-based studies on persons who exchange sex, although some studies have been done in singular settings such as prisons and exotic dance clubs. Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website. Contextual determinants of condom use among female sex exchangers in East Harlem, NYC: an event analysis. Are uncomfortable sharing information about sexual and substance use histories as part of HIV testing protocol. Links with this icon indicate that you are leaving the CDC website. It is important for people who exchange sex to get tested for HIV regularly and know their status.