Nathalie Bajos, sociologist and demographer, is Director of Research at Inserm and Director of Studies at EHESS. Sheworks at the Institut de Recherche Interdisciplinaire sur les enjeux Sociaux - Sciences sociales, politique, santé (INSERM-CNRS-EHESS). Her research focuses on the social production of health inequalities, in the field of sexuality and sexual health (co-responsible for the three national surveys on sexuality 1992, 2006, 2023), on Covid-19 and on cardiovascular disease (ERC-Synergy Project 2020-2027). Based on major quantitative surveys of the general population and qualitative surveys in France and abroad, the results of its multi-disciplinary research, which brings together sociologists, demographers, epidemiologists and economists, are used to support public decision-making and healthcare professionals.

A member of numerous scientific commissions in France and abroad, she was also head of the Department for the Promotion of Equality and the Fight against Discrimination at the French Rights Defender (2015-2018), directed the 2020 sociological survey on sexual violence in the Catholic Church for the Independent Commission on Sexual Abuse in the Church, and has chaired the National AIDS and Viral Hepatitis Council since February 2024.