Shereen El Feki is the author of "Sex and the Citadel: Intimate Life in a Changing Arab World" (Random House, 2013). With a doctorate from the University of Cambridge, she is a former immunologist turned healthcare journalist with The Economist and Al Jazeera. Most recently, she was vice-chair of the UN's Global Commission on HIV and the Law. She is an expert on social change in the Arab region, particularly as it relates to sexual and reproductive life, and served as vice-chair of the Global Commission on HIV and the Law, representing the Arab region. She is a United Nations Global Expert, a project of the United Nations Alliance of Civilizations. Her passion lies in projects that aim to better understand, and surmount, the social challenges facing Arabs, particularly young people.