Professor Martine Vrijheid is an environmental epidemiologist and head of the Childhood and Environment Programme at ISGlobal. Her research focuses on improving our understanding of the environmental risk factors for child health and development and the origins of later disease, in order to underpin preventive action. Her research approach is strongly nested in longitudinal cohort studies, starting in pregnancy and following children through adolescence, as a powerful platform for etiological research. She leads and has led numerous national and international projects, and has published extensively in this field. She coordinated the European collaborative HELIX (Human Early Life Exposome) project, funded by EC FP7. In HELIX she spearheaded the push for a more holistic exposome approach to study multiple, co-existing exposures and their effects on molecular responses and child health. She is continuing this research as coordinator of the EC H2020 project ATHLETE (Advancing Tools for Human Early Life-course Exposome Research and Translation), which aims to advance important challenges in exposome research through improved tools, data, and translation.