"Clean hands, safe care" is the theme of this year's World Hand Hygiene Day. At MSF, we know that Hand Hygiene is the simplest and best way to prevent the transmission of infections in our facilities. This collection features some lessons learned about hand hygiene and infection, prevention, & control (IPC) in MSF projects, especially in resource-constrained environments in the Sahel, and in the era of COVID-19.

As the ongoing Covid-19 pandemic grips the world, one of its most devastating indirect effects is the disruption to medical services for preventing and treating other life-threatening diseases—especially in countries with already-fragile health systems. For MSF and other global health actors this means not only responding to Covid-19 directly but also assessing its impact on other essential care and then adapting programs so they can keep serving patients despite the enormous obstacles. In this Collection you will find a selection of published articles and conference content from this year’s MSF Scientific Days 2021 conference content, encompassing a range of approaches, settings and medical challenges—from malaria, TB and HIV/AIDS prevention and care to digital health promotion and sexual and reproductive health.

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.