On 1 December, the special session of the World Health Assembly, acting by consensus, adopted a historic resolution to launch an intergovernmental process to develop a new global accord on pandemic prevention, preparedness and response. In this Deep Dive session, we will be asking the question: “how would a pandemic treaty contribute to well-being?” The session will start with a discussion on the impact of COVID-19 on people’s and societies’ well-being. We will then reflect on the implications of a pandemic treaty for the promotion of health and well-being in public health emergencies and in pandemic preparedness and response. Finally, we will discuss specific interventions to support health promotion and well-being in the context of a pandemic and explore how the topic could be addressed in a pandemic treaty.