Evaluation of Implementation of the Phoenix PrEP (Pre-Exposure Prophylaxis) Access Project for Youth Aged 13-24

Inclusion Criteria * sexually active youth aged 13 through 24, * at risk for contracting HIV, * Negative for HIV as indicated by Negative Elisa and Western Blot (WB) or Negative 4th Generation test, * weight greater than 35kg, * offered PrEP to reduce the risk of contracting HIV. Exclusion Criteria * Unknown or Positive HIV status, * Renal Impairment as indicated by elevated BUN or Creatinine, abnormal urinalysis, * Active infection with Hepatitis B Virus, * Taking other medications containing Emtricitabine, Tenofovir or tenofovir alafenamide(TAF) such as Atripla, Complera, Emtriva, Genvoya, Odefsey, Stribild, and Viread taking drugs containing lamivudine, * taking Hepsera, * clinical symptoms consistent with acute viral infection within the past month.