The climate crisis is also a health and humanitarian crisis, disproportionately impacting people in the world’s most climate-sensitive regions—mainly low- and low-middle income countries with the least capacity to respond. MSF and other humanitarian organizations witness the consequences daily. More frequent, intense weather events and a warming planet contribute to food and water scarcity, more severe and widespread disease outbreaks, and more injuries and preventable deaths. They also drive massive population displacement, with over 32 million people fleeing their homes in 2022 alone due to floods, drought, storms and fire—nearly triple the number displaced by violence and conflict. As global leaders convene in Dubai for the UN climate conference (COP28, 30 Nov-12 Dec 2023) we present this cross-section of work by MSF and collaborators, drawing from first-hand experience at our medical projects. Emphasizing the urgency of adapting humanitarian operations to the climate crisis, the collection also explores loss and damage through a health lens, proposes policies and practices for creating climate-resilient health organizations, and advocates for embedding fair, just ethics perspectives into humanitarian action and research on climate.

The climate crisis is also a health and humanitarian crisis, disproportionately impacting people in the world’s most climate-sensitive regions—mainly low- and low-middle income countries with the least capacity to respond. MSF and other humanitarian organizations witness the consequences daily. More frequent, intense weather events and a warming planet contribute to food and water scarcity, more severe and widespread disease outbreaks, and more injuries and preventable deaths. They also drive massive population displacement, with over 32 million people fleeing their homes in 2022 alone due to floods, drought, storms and fire—nearly triple the number displaced by violence and conflict. To mark Earth Day 2024 (22 April) we present a cross-section of work by MSF and collaborators, drawing from a range of data sources and from first-hand experience at our medical projects. Emphasizing the urgency of adapting humanitarian operations to the climate crisis, the collection also explores loss and damage through a health lens, proposes policies and practices for creating climate-resilient health organizations, and advocates for embedding fair, just ethics perspectives into humanitarian action and research on climate.

Viral hepatitis is a major cause of disease and death globally. To mark World Hepatitis Day (July 28th) we present a selection of recent MSF research exploring how to effectively deploy powerful medical tools that could turn the tide on hepatitis C and E—but now reach only a tiny fraction of people who desperately need them, especially in low-resource and emergency settings. For hepatitis C, where groundbreaking new antiviral drugs can cure nearly all patients, MSF is piloting simplified, community-based models of care that offer rapid screening, diagnosis, and treatment under one roof. Some programs focus on the complex needs of highly vulnerable, hard-to-reach populations, such as people co-infected with HIV or TB or who inject drugs. Turning to prevention, an ongoing vaccination campaign against hepatitis E in an outbreak setting is showing early signs of short-term protection. Final results from this South Sudanese refugee camp, where poor sanitation and water quality regularly lead to outbreaks, should help plug a key evidence gap that—along with other barriers discussed in a commentary article—impedes widespread uptake of the vaccine.