About PRISM – The Homelessness and Mental Health Reaffiliation Program (PRISM) is a partnership between the Old Brewery Mission, Le Chaînon and the psychiatric services of Notre-Dame Hospital of the CIUSSS Centre-Sud de l’Île de Montréal. PRISM is intended for adults who are chronically homeless or in the process of becoming chronic, with psychiatric disorders. The program offers medical and psychosocial follow-up in a short-term stabilization framework, with the ultimate goal of promoting an exit from homelessness. The PRISM team includes CIUSSS workers (psychosocial worker, nurse, psychiatrist) and community workers.