The HIV/AIDS epidemic remains largely out of control in many areas of the world, with an estimated 2.5 million new HIV infections worldwide in 2007. Developing countries with few economic resources and world regions undergoing difficult social transitions have been particularly impacted by large increases in HIV and sexually transmitted disease (STD) infections. To date, effective individual prevention approaches have not been rapid enough to avert the epidemic in these areas and may be too resource intensive to maintain. Behavioral HIV prevention interventions on the community level seek to reduce the prevalence of high-risk sexual behaviors by reaching large numbers of vulnerable people in a cost-effective and feasible manner, even in areas with limited resources. The Community Popular Opinion Leader (C-POL) program is an HIV prevention intervention that recruits and trains trusted opinion leaders in the community to promote safe sex behaviors through risk-reduction conversations with peers. Implementing the C-POL program in world regions facing significant HIV/AIDS epidemics may be the most effective means of encouraging behavior change among members of at-risk populations and strengthening social norms to maintain these changes. This study will evaluate the effectiveness of the C-POL program in promoting safer sexual behaviors and reducing the transmission of HIV/STDs among at-risk populations in China, India, Peru, Russia, and Zimbabwe.

Participation in this study will last 2 years. Initially, an ethnographic study will be conducted to determine the HIV/STD knowledge, attitudes, and behaviors among the population living in the target communities. Information collected via observation, focus groups, and interviews will be used to determine the social risk groups operating within the community and to identify and recruit the opinion leaders who are influential in these groups. Also, an epidemiological study will be conducted to collect information on sexual behaviors and HIV/STD rates.

A cohort of members from participating communities will first undergo baseline assessments that will include a survey about general health and knowledge of HIV/STDs and a biological sampling for HIV/STD testing. Participating communities will then be assigned randomly to receive the C-POL intervention and HIV/STD educational materials or HIV/STD educational materials alone. In communities receiving the C-POL intervention, the previously recruited opinion leaders will be taught skills for sharing HIV risk-reduction messages in daily conversation with peers. This training will occur over four to five weekly sessions. At least 15% of the community population will be trained as opinion leaders. After the initial training, opinion leaders will attend six to nine booster sessions over the next 2 years to reinforce and support continued conversation efforts. Communities assigned to receive the HIV/STD educational materials will receive informational materials on HIV/STDs to provide to community members and will provide treatment or treatment referral for people with nonviral STDs.

All participants in the baseline cohort will be asked to repeat the baseline testing 1 and 2 years later. Participants who are not able to visit a clinic for testing will be contacted by phone to complete the baseline survey. After the 2-year assessments, the C-POL intervention will be conducted in the communities that received educational materials only.