Online surveys for the Prevention Umbrella for Men in the Americas (PUMA) were led by PRISM Health to collect data in the United States, Peru, and Brazil to inform the larger PUMA study being undertaken out of the University of California San Francisco and led by Susan Buchbinder. PUMA aimed to build an efficacy trial and HIV prevention package by selecting interventions that were likely to have the largest impact among MSM. The project has collected surveys in Peru, Brazil, and the United States, and gathered information on technology use, sexual behavior, HIV and STI testing behavior, and other information helpful for developing a package of behavioral and biomedical HIV interventions.