Inclusion Criteria:  Live in the San Francisco Bay Area, CA (the 9-counties of Alameda, Contra Costa, Marin, Napa, San Mateo, Santa Clara, Solano, Sonoma, and San Francisco); Los Angeles County, CA; Miami-Dade County, FL; or Broward County, FL. Qualify for PrEP by virtue of self-reporting being diagnosed with a sexually transmitted infection (including chlamydia, genital herpes, gonorrhea, syphilis, genital warts, HPV, trichomoniasis, and other less common STIs) in the past six months or self-reporting unprotected anal intercourse in the past 90 days. Report having sex with men Either: Identify as a cisgender male and age 15-17 (in California only; minors in Broward or Miami-Dade Counties will not be eligible) OR identify as a cisgender male and age 18-27 OR identify as a transgender woman (or assigned male at birth and identify as a woman) and age 18-27  Exclusion Criteria:  Must not have taken PrEP in the past 30 days Ever been diagnosed with HIV, hepatitis B, kidney disease, liver disease, or bone disease. Not meeting inclusion criteria