Welcome to ACCESS DENIED: A Conversation on Unauthorized Im/migration and Health! The aim of this blog is to stimulate dialogue about a vital global health challenge: unauthorized migrants’ and immigrants’ lack of access to health care services. The blog challenges readers and contributors to re-think the political common sense that denies im/migrants access to health care. We also consider how the increased movement of people across national borders affects the health and health services of receiving communities. Jessica Mulligan is a founding member and regular contributor to this blog.