How can people on tight budgets maintain a balanced diet? *La Santé de l'homme* dedicates this issue’s feature section to vulnerable populations and the challenges they face in accessing food. Thirty experts review the current state of knowledge on the subject and present initiatives aimed at improving access. Also in this issue, in the following sections: Swiss cities are adapting to pedestrians; valuing mothers’ traditional knowledge; preventing addictive behaviors in New Caledonia...