SHAG is a text messaging-based HIV prevention program designed for cisgender sexual minority boys and men 13-20 years of age across the United States. Investigators will test it against a control group that receives messages about healthy lifestyle.

SHAG is a text messaging-based HIV prevention program designed for cisgender sexual minority boys and men 13-20 years of age across the United States. Investigators will test it against a control group that receives messages about healthy lifestyle. Harnessing the power of technology, young people will be recruited online and largely enrolled digitally. The main outcome of interest is HIV incidence. The impact of the intervention on STI testing and pre-exposure prophylaxis (PrEP) will also be examined.

Inclusion Criteria:

1. have been assigned male sex at birth and currently have a cisgender identity;
2. be aged 13-22 years old;
3. have had anal sex in the past 12 months;
4. be English-speaking;
5. exclusively own a cell phone with an unlimited text messaging plan and intend to have the same cell phone number for the next 6 months;
6. have Internet access to complete online surveys;
7. provide informed assent for those under 18, and consent for those 18 years of age and older, including a capacity to consent and a positive self-safety assessment;
8. Willing to take an OraQuick home test to confirm HIV negativity for youth who are 19-20 years of age or 18 years old and graduated high school. If they agree to do the test but do not upload a photo of their result, they will be eligible if they self-report a negative sero-status. Youth 18 years old who have not graduated high school, and 13-17 years of age will be asked to take a home test. If they determine that they cannot do so safely, they will be allowed to self-report their sero-status; and
9. not currently enrolled in another HIV prevention program; or
10. know anyone already enrolled in the RCT.

Exclusion Criteria:

• Being HIV positive

Individual-level de-identified data will be made available through controlled access.

Data will be available starting 12 months after the grant ends.

• Data access requires sponsorship by an Institution on behalf of the prospective recipient.
• Requester must provide documentation of local IRB approval
• Requester agrees to make results of studies using the data available to the larger scientific community
• Requester must provide a letter of collaboration with the primary study investigator
• Use of the data is limited to not-for-profit organizations
• Use of the data is limited to health purposes

Control group content is written to affect an experience as if one were in the intervention group.