Chicago clinic tests new way to find hidden HIV and addiction cases

This study will test two new services at a large Chicago health center: routine substance use screening for all patients, and a program that asks people to refer friends or partners who might need HIV or addiction care. The goal is to find more people with undiagnosed HIV or substance use disorder and connect them to treatment. About 500 men who have sex with men will take part. The study will measure how well these methods work and whether they can be used long-term.