for people ages 12-24 (full criteria)
healthy people welcome
study started
estimated completion
Dallas Swendeman(ucla)



The focus of this study (Engaging Seronegative Youth to Optimize HIV Prevention Continuum) - will be to stop HIV-related risk acts and to encourage youth at high risk for HIV to adopt antiretroviral medications as treatment and prevention (either pre exposure prophylaxis (PrEP) or post exposure prophylaxis) among gay, bisexual and transgender and/or homeless youth with contact with the criminal justice system in the HIV epicenters of Los Angeles and New Orleans. A cohort of 1500 youth at the highest risk of seroconverting over 24 months will be identified. The goal will be to optimize the HIV Prevention Continuum over 24 months. The proposed randomized controlled trial (RCT) aims to compare youth outcomes when randomized to one of four automated and person-mediated social media delivered intervention conditions: 1) Automated Messaging and Monitoring Intervention (AMMI) only (n=900) consisting of daily motivational, instructional, and referral text-messaging (SMS), and brief, weekly SMS monitoring surveys of outcomes; 2) Peer Support through social media plus AMMI (n=200) via private online discussion boards; 3) Coaching plus AMMI (n=200) to provide service linkages, eligibility support, appointment coordination and follow-up, communication with healthcare providers, and brief motivational and strengths-based counseling for linkage and retention to prevention, mental health, and substance abuse services; and, 4) Coaching plus Peer Support and AMMI (n=200).


Despite dramatic improvements in the biomedical treatments for both preventing and treating HIV infection, American adolescents are increasingly likely to become infected, are not using ARV for prevention or treatment, and are not learning they are HIV seropositive when they have become infected. America's HIV epidemic among youth has more than doubled in the last 15 years and now represents 26% of the epidemic. These youth are not found in every community - geography is destiny in HIV prevention ( YLH are concentrated along I-95 on the East Coast, in Southern cities, and West Coast. Given the distribution of emerging infections, we have chosen two HIV epicenters, Los Angeles (LA) and New Orleans, to test a strategy to identify, link to care, and intervene to prevent HIV. Even in those two areas, adolescent HIV will not be found in every neighborhood. In LA, six neighborhoods account for 80% of HIV cases in the County - reflecting the concentration of HIV within neighborhoods and settings. In each epicenter, the youth at highest risk of infection will be gay, bisexual, and transgendered youth (GBTY), especially those who are Black and Latino. Homeless youth will also be at highest risk: the last HIV seroprevalence study showed a 5.3% rate among homeless youth. Youth who are incarcerated are at higher risk of being in risk setting and will be targeted for recruitment to this study. Having a sexual orientation as GBTY is highly stigmatizing and youth are developmentally challenged about who, when, how, and what to disclose their sexual orientation of HIV status to their families and their peers. Unfortunately 42% of GBTY's parents eject their children when children disclose being GBTY resulting in 40% of homeless youth being GBTY. Homeless GBTY had a seroprevalence of 24.8% in 1989.

The sites that typically serve GBTY and High Risk Youth (HRY) (gay-identified CBO and homeless shelters) in HIV epicenters only provide HIV testing to about 10% of youth currently. To effectively stop HIV among youth, a more integrated strategy that tests for HIV and STIs repeatedly, links youth to care, and helps youth access all HIV prevention strategies, including Pre Exposure Prophylaxis (PrEP) and Post Exposure Prophylaxis (PEP), is needed. The proposed research will test such a strategy.

To eliminate HIV among youth, scalable, efficacious, and cost-effective strategies are needed to optimize the HIV Prevention Continuum of repeat testing, linkage to biomedical and behavioral prevention, and retention and adherence over time to PrEP, PEP, condom use and reduced number of partners. The HIV Prevention Continuum is a framework for guiding prevention efforts.

Advances in mobile and social media technologies have created opportunities to engage and intervene with large numbers of youth at relatively low costs, technologies that permeate their daily routines. This study will use two primary technology platforms: text-messaging and social media. Text-messaging, email, internet and social media use are nearly universal among youth, including homeless youth. Rates of mobile phone, smartphone, and internet usage increase with age, and nearly 90% of young adolescents (age 13-17) having a mobile phone. Texting is particularly important for adolescents; 90% of those with phones text, typically receiving and sending 30 texts each day. Similarly, over 90% of adolescents under age 18 go online daily, more than half several times a day, which is facilitated the three quarters with smartphones that are crossing the digital divide. African-American and Latino youth have higher rates of smartphone and internet use than White. All of these rates increase for adolescents 18 and over. Ownership, access, and use rates are similar for homeless youth, although with less frequency and some inconsistency. Much of this online activity is driven by social media, particularly via smartphones, with over 70% of adolescents under 18, for example, using Facebook and other applications (about half also use Instagram and Snapchat).

The interventions proposed in this study will use text-messaging and social media to engage "youth where they're at" in the digital environment as preferences and functions change. Importantly, mobile phones continue to receive text-messages even when data plans run out of credit to use apps' and mobile-web browsers or send text-messages. Therefore, the core component our technology strategy will be text-messaging in the Automated Messaging and Monitoring Intervention (AMMI) for all youth in the cohort. Social media will be used by Peer Supporters to engage and support their peers through online discussion boards while Coaches will engage through social media, text-messaging, and voice and video-chats (however most acceptable to individual youth), as well as in person contacts. Mobile and social media technology-based engagement, retention, prevention, and mobilization strategies are likely to be scalable. This study will test whether they are also efficacious and cost-effective.

Upon study launch in April 2017, decisions were made with the funder to provide three-site STI testing at baseline and every follow-up assessment. In December 2018, the funder changed priorities and reduced support for STI testing to rectal testing only at baseline, 12- and 24-month follow-up, unless the participant displays STI symptoms or requests testing at other follow-up assessments. The funder has also decided to terminate the intervention and follow-up assessments at 12 months, rather than 24 months, for youth who are at lower behavioral risk for HIV acquisition.


HIV Mental Health Substance Use STI Peer Support Automated Messaging & Monitoring Coaching Coaching + Peer Support


You can join if…

Open to people ages 12-24

  • Youth aged 12-24
  • HIV-negative status
  • Able to provide informed consent
  • At high-risk* of HIV
  • Youth will be considered at high-risk of HIV based on their responses to a screening questionnaire, which assesses - HIV status; PrEP / PEP use; gender; race/ethnicity; sexual orientation; homelessness; history of probation/incarceration; history of hospitalization for mental health issues; history of substance abuse use and treatment; and, history of STI.

You CAN'T join if...

  • Youth under 12 years of age or above 24 years of age
  • HIV-positive (if you become HIV-positive, they will be invited to participate in another, related ATN study)
  • Unable to understand the study procedures due to intoxication or cognitive difficulties (any youth who appear to be under the influence of alcohol or drugs will be unable to enroll in the study but invited to return at a later date)
  • Unable to provide voluntary written informed consent
  • Do not meet aforementioned criteria for being at high-risk of HIV


  • University of California, Los Angeles accepting new patients
    Los Angeles California 90024 United States
  • Tulane University Health Sciences Center accepting new patients
    New Orleans Louisiana 70112 United States

Lead Scientist