Clinical trial Recruiting at 1 site Interventional Ages 18 and up Men only

Online cohort of sexual and gender minorities testing digital support to boost PrEP and ART use

Official title: Online Cohort of Sexual and Gender Minorities: Evaluating the Effect of Digital Interventions on the Uptake and Adherence to HIV Pre-Exposure Prophylaxis and Antiretroviral Treatment

Run by Oswaldo Cruz Foundation · NCT07772791 · Data updated 2026-11-12

In Brazil, sexually and gender diverse adults are being followed online to see if weekly WhatsApp reminders help people stick to PrEP or ART.

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Quick facts

Study typeInterventional
Ages18 Years and up
SexMen only
Enrollment3000 (estimated)
SponsorOswaldo Cruz Foundation
Academic / other
Locations1 site (Rio de Janeiro, Rio de Janeiro)
StatusRecruiting
StartedMay 25, 2026
Main results expectedDecember 2028
Study endsDecember 2028
Registry record updatedAugust 19, 2026
Trial IDNCT07772791 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults aged 18 or older who identify as male sex assigned at birth, travesti, transgender, or non-binary, reside in Brazil, have internet access, and have had sex with a man in the past year.

Probably not a fit

Individuals not using PrEP or ART, or those not receptive to digital reminders, may not benefit from this intervention.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This interventional study creates an online cohort of sexual and gender minorities in Brazil to observe PrEP and ART use and adherence over one year through quarterly surveys. Participants on PrEP or ART are randomized to receive either a digital WhatsApp reminder program for six months or no digital intervention. The primary question is whether weekly WhatsApp messages can improve adherence to PrEP or ART. Data collection includes medication use, sexual behaviors, HIV testing, STIs, mental health, and experiences of discrimination in health services. The study is led by Oswaldo Cruz Foundation with site activities at Instituto Nacional de Infectologia Evandro Chagas in Rio de Janeiro.

Why it matters

Potential benefit: If successful, participants may experience improved adherence to HIV prevention and treatment regimens through simple digital reminders.

How similar studies have gone: Prior studies have shown mixed results for digital reminders; this study tests a specific WhatsApp-based approach in a Brazilian LGBTQI+ population.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

male sex assigned at birth and identifying as a man, travesti, transgender person, or non-binary person; age ≥18 years; residing in Brazil; access to the internet; and self-reporting sex with a man in the past 12 months.

Exclusion Criteria:

incorrectly answering the attention-check questions; and incomplete responses, defined as not reaching the end of the screening questionnaire

Where it's running

  • Instituto Nacional de Infectologia Evandro Chagas
    Rio de Janeiro, Rio de Janeiro, Brazil
    Recruiting

Study contacts

Similar studies

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.