The study is a prospective cohort of young Black MSM who are followed for 2 years either
in-person at the PRISM Health Research Clinic and/or virtually with telehealth study visits.
Follow-up visits occur as frequently as every 3 months, or as appropriate to clinical needs
of HIV PrEP or STI PEP. The investigators will enroll men who are not on PrEP at study
initiation and who may decide to start or stop PrEP, change from daily oral PrEP to on-demand
PrEP or from on-demand PrEP to daily PrEP, and/or start or stop STI PEP at any point in the
study period. If there is trouble enrolling men who are not currently on PrEP, the
investigators will expand enrollment criteria to include men currently on PrEP. All men will
be provided with the study's mobile smart phone app to support early identification of risks
for PrEP discontinuation, to provide information about STI PEP and document usage patterns of
on-demand PrEP and STI PEP, and to support easy linkage to support services for PrEP
counseling and addressing concerns or questions about STI PEP.