This study includes finalization of the LINKED social network intervention to improve PrEP and MOUD uptake among people who inject drugs (PWID) in collaboration with an Expert Advisory Board and staff (N=16) at The Sidewalk Project (TSP), followed by a Hybrid Type II cluster randomized trial of the LINKED intervention (versus an equal-attention control) among N=372 people who inject drugs, with 6- and 12-month follow-up assessment of PrEP and MOUD uptake. The investigators will also evaluate implementation outcomes to inform future sustainable implementation of LINKED in harm reduction organizations.

Inclusion Criteria:

Aim 1 - Virtual Focus Group

• Is 18 years or older
• Is a current TSP staff
• Is capable and willing to provide consent

Aim 2 - Intervention

• 18 years or older
• Spend majority of their time in the Los Angeles, CA area where recruited
• Able to complete surveys and group sessions in English
• Self-report to have injected drugs in the past 3 months
• Self-reported HIV negative serostatus
• Not currently on PrEP or MOUD
• Not pregnant
• If a network recruit: presents a valid recruitment coupon
• Is capable and willing to provide consent

Aim 3 - Virtual Focus Group/Surveys

• Is 18 years or older
• Is a current TSP staff
• Is capable and willing to provide consent

Exclusion Criteria:

Aims 1 and 3:

• Individuals who are not current TSP staff members will be excluded from participation.

Aim 2:

• Under age 18;
• Does not spend majority of time in the Los Angeles, CA area where recruited;
• Unable to complete surveys and groups sessions in English;
• Does not self-report injecting drugs in past 3 months;
• Self-reported HIV positive serostatus
• Currently on PrEP or MOUD
• Currently pregnant
• If a network recruit: does not present a valid recruitment coupon

The de-identified participant data from the final research dataset will be shared upon reasonable request beginning 9 to 36 months after publication or as required by a condition of awards or supporting agreements, provided the requesting investigator executes a data use agreement with NYU Langone Health. This instance of data sharing will also require separate IRB review as well as review from NYU Langone's Data Sharing Strategy Board (DSSB). Requests should be directed to: Suzan.Walters@nyulangone.org. The protocol and statistical analysis plan will be posted on Clinicaltrials.gov only as required by federal regulation or supporting awards and agreements.

Beginning 9 months and ending 36 months following article publication or as required by a condition of awards and agreements supporting the research.

The investigator who proposed to use the data will be granted access upon reasonable request. Requests should be directed to Suzan.Walters@nyulangone.org. To gain access, data requestors will need to sign a data access agreement. This instance of data sharing will also require separate IRB review as well as review from NYU Langone's DSSB.