Climate, Health and Policy

As climate change increasingly threatens human health, there is an urgent need for evidence that informs effective adaptation and mitigation policies. The Climate, Health and Policy Group investigates how climate change affects human health, with a particular focus on extreme heat. The group combines environmental epidemiology, exposure assessment, policy analysis and participatory approaches to generate evidence on climate-related health risks and identify vulnerable populations. This evidence is used to support the development and evaluation of adaptation strategies and interventions that strengthen climate-resilient and equitable health systems and protect population health.
 

Cohort studies

We conduct prospective cohort studies in Switzerland and other countries, including comparative analyses to assess short- and long-term health impacts of climate and environmental exposures. With this, we aim to understand risk factors across settings, promote mutual learning, and identify effective solutions for strengthening climate resilience.

Exposure-related health outcomes

We are interested in assessing a wide range of health outcomes in relation to heat and other environmental exposures. Our research covers mortality, morbidity, health care use, and occupational injuries. We also explore novel data sources, combined with detailed exposure assessment.

Policy and tools

We conduct policy-relevant research to inform climate and health decision-making. This includes the development of evidence-based strategies, indicators, tools and approaches to reduce health risks and support public health practice. We regard participatory and transdisciplinary approaches as an essential component of our work.

Martina Ragettli

Head of Climate, Health and Policy
+41612848729 , -
martina.ragettli@swisstph.ch

Logo of the CCHeSS study on heat and health in Switzerland (Graphic: Swiss TPH)

Study on heat and health in Switzerland

The CCHeSS study investigates how increasing heat affects people's health, well-being, daily behaviour and use of healthcare services in Switzerland. Working closely with participants and communities, the project aims to generate evidence on the health impacts of heat and co-develop practical measures to strengthen resilience in a warming climate. → Read more

A thermometer against a blue summer sky shows high temperatures (Photo: AdobeStock)

Evaluating heat-health protection measures in Switzerland

Swiss TPH supports the Federal Office of Public Health (FOPH) in strengthening Switzerland's response to increasing heat risks. Through a series of nationwide surveys among the public, health authorities, healthcare professionals and hospitals, the project assesses the implementation of heat-health protection measures, identifies gaps and provides evidence-based recommendations to improve preparedness and protect population health in a changing climate. → Read more

Choi Y et al. Temporal changes in mortality risk associated with PM10 across 143 cities in 26 countries: a multicountry, multicity time-series study. Lancet Planet Health. 2026(in press):101465. DOI: 10.1016/j.lanplh.2026.101465

Eom S et al. Minimum mortality temperature by cause of death and age group: a multi-country observational study (1990-2019). Environ Res. 2026;305(Pt 2):125043. DOI: 10.1016/j.envres.2026.125043

Hwang H, Ragettli M.S, Eeftens M, Lee J.Y. Spatiotemporal prediction of aeropollen concentration using tree-based machine learning. Environ Res. 2026;292:123657. DOI: 10.1016/j.envres.2025.123657

Iñiguez C et al. The burden of premature births attributed to heat across 13 countries. Environ Int. 2026;212:110286. DOI: 10.1016/j.envint.2026.110286

Vaghefi A.S et al. Quantifying the financial burden of heat-related hospital admissions in Switzerland under a changing climate: a scalable analytical framework. BMC Glob Public Health. 2026;4:52. DOI: 10.1186/s44263-026-00275-w

Wagatsuma K et al. The joint impact of temperature, humidity, and air pollution on COVID-19 incidence: a multi-country time-series study in 439 cities. Environ Int. 2026;208:110090. DOI: 10.1016/j.envint.2026.110090