Climate change and health: new challenges for epidemiology and public health

Climate change contributes to a rapid and deep modification of the environment. In the same time, other factors such as population increase, ageing or urbanization increase the vulnerability to various environmental and health risks. Chains of complex interactions are impacting populations' health and well-being. Developing prevention measures is an asset to reduce the health impacts of present climate change (through adaptation measures) and to limit the intensity of future impacts (through mitigation measures). Mitigation will result in major changes in several sectors, for instance housing, transports or agriculture. Taking into account the potential health impacts is important to avoid choices impairing human health, and to maximize health co-benefits. In this paper we propose a reflection on how present and future climate change in France challenges epidemiology and public health in the next few years. While many questions remain unanswered, there is a consensus on the importance of the links between climate change and human health, that can be summarized into three points: 1) climate change already impacts human health, 2) adaptation and mitigation are needed to reduce those impacts, 3) adaptation and mitigation can rely on immediate measures that would be beneficial for health and for climate. An integrated and interdisciplinary approach is essential to tackle the complexity of the issue, of its implications for public health, for research, surveillance and intervention. (authors)