This study examines a social media based peer-led and delivered intervention focused on increasing PrEP adoption in young men of color who have sex with men (YMCSM). While prior efficacy trials have included YMCSM 18-29, we will focus on PrEP in YMCSM outside clinical trial settings. Rather than an alternative medium for implementation of existing interventions designed for in-person contact, social media may be a true 'game changer' to engage hard to reach individuals. While many online behavioral interventions exist, including some that use social media, this will be one of the few studies to use and test social media to facilitate uptake of a biomedical intervention. E-PrEP will connect the target population (YMCSM) to a new prevention tool (PrEP) through rapid linkage to medical care, accelerating diffusion of PrEP. Given the paucity of data regarding social media-based interventions to change health-related behavior, E-PrEP may have a marked impact on future bio-behavioral interventions, especially those that include diffusion of innovation. Social media offers the power of scale and efficiency for large potential impact, even with relatively low-intensity interventions. Similarly, PrEP, if widely adopted in high-risk populations and offered with behavioral interventions, could markedly decrease HIV infection rates. Social media-based, peer-led approaches like E-PrEP could be used to enhance efforts by community-based and other organizations that employ internet-assisted or peer-outreach strategies to improve health.