This document summarizes a harm reduction project in Washington D.C. called PreventionWorks!. The project aims to reduce harms from drug use and HIV transmission through services like needle exchange, safe sex kits, wound care, and referrals to treatment. They operate a mobile unit that visits neighborhoods in Northeast D.C. with many injection drug users. On a typical day, the mobile unit engages with about 30 people by providing supplies and linking them to medical care.