Step 1: Participant enrollment. This will involve recruiting youth to participate in the pilot study. Participant recruitment strategies will include: social media, online, event- and venue based, participant referral, and walk-ins at study clinics. Participant enrollment will be completed by study team.

Step 2: Intervention implementation. Following participant recruitment and enrollment in the study. Study participants will be assigned to one of the 5 youth participatory interventions focused on expanding the uptake of HIV self-testing and key HIV prevention services. The pilot intervention implementation would occur for 6 months. Nigerian Institute of Medical Research (NMIR) will provide local training on HIV prevention to the five participatory interventions following their existing guidelines.The participatory interventions will be conducted in the locations of the five teams who emerged as winners from the innovation boot-camp. These participatory interventions will only provide HIV self-testing kits and instructions of how to perform the test to participants. They will also provide referral coupons to youth friendly centers for sexually transmitted infections (STI) screening and treatment and pre-exposure prophylaxis (PrEP) awareness and initiation for at-risk youth. The referral coupons are intended to provide study participants information on trained youth friendly centers that are involved with the research. The referral coupons give the study participants access to other sexually transmitted infections (STI) screening and treatment and pre-exposure prophylaxis (PrEP) awareness and initiation at these health facilities. The intervention only provide participants with the HIV self-testing kits and then refer them to youth-friendly health facilities for other testing services. The intervention does not involve monitoring HIV self-testing procedure, the investigators will only be asking for self-reported HIV testing and other sexually transmitted diseases testing.

Step 3: Baseline data collection. After allocation of participants into the intervention, study team will collect baseline data on HIV testing history, sexual behavior history, youth participation experience, and other related outcomes will be collected (survey questionnaire attached) from recruited participants. Participants mobile phone numbers will also be collected as tracking information for follow-up and retention in a coupon format. The mobile phone numbers would be used to contact study participants through text messages and phone calls. These contacts would serve as reminders for participants to participate in follow-up data collection. The mobile phone service charge would be covered by the research. No other personal identifiers will be collected and no biological specimens will be collected at baseline. The investigators will obtain informed consent before proceeding with any data collection.

Step 4:Health facilities training. For the purposes of this research study, the Nigerian Institute of Medical Research team would provide training to youth-friendly health centers currently working with the Nigerian Institute of Medical Research based on the World Health Organization guidebook for youth-friendly health services (handbook is attached).The training would be to ensure that these health facilities are trained to provide youth friendly services to participants who be referred to receive STI screening, STI treatment and PrEP awareness and initiation. Following the training, the NIMR research team would in charge of collecting data to record record participants HIV self-testing uptake as well as uptake of STI screening, STI treatment and PrEP awareness and initiation.

Step 5: Follow up surveys at 3 and 6 months: At 3 and 6 months post intervention implementation, study team will collect similar baseline data from study participants. The follow-up survey will assess HIV testing, sexual behavior history, youth participation experience and other related outcomes will be collected (survey questionnaire attached) from recruited participants.