Homeless deaths are dropping. This group is part of the reason why.

It takes 20 minutes to find out if you have HIV. On a Monday in March, Dulce Delgado, a 37-year-old woman living in a tent on a hill, held out her hand. Prizma Mercado, a member of a roving medical team called Healthcare in Action, pricked a finger. Blood welled up on the skin and Mercado dropped a small amount onto a test strip. The timer began counting down. Last year, homeless people in San ...