The informal settlements of the Global South are the least prepared for the pandemic of COVID-19 since basic needs such as water, toilets, sewers, drainage, waste collection, and secure and adequate housing are already in short supply or non-existent. Further, space constraints, violence, and overcrowding in slums make physical distancing and self-quarantine impractical, and the rapid spread of an infection highly likely. J Urban Health international aid, NGOs, and community groups to innovate beyond disaster response and move toward longterm plans.

Statement by the scientific committee* of the International Science Council's Programme on Urban Health and Wellbeing, on critical elements of urban health action in response to the epidemic.

Africa is undergoing rapid urbanisation with migration into informal settlements. Exposure to these environments is associated with a rise in infectious and non-communicable diseases. Addressing these urban health challenges will require collaboration across sectors that influence health. However, the siloed nature of policymaking means that little is known about the barriers and facilitators of integrated intersectoral policy approaches for improving health through urban planning and development. Furthermore, the transdisciplinary research methodological approaches to establishing intersectoral collaboration are not well documented in Africa. We utilised participatory methods to engage a variety of stakeholders in the co-design and conduct of a transdisciplinary workshop. Through co-development processes, this workshop was designed to explore stakeholder perspectives on urban health priorities in Douala municipalities and experiences of intersectoral collaboration. We describe the process and experience of co-creation of the workshop agenda between academic, policy, private and civil society partners. We further present stakeholder experiences of intersectoral collaboration prior to the workshop, convey their understanding of the urban drivers of ill health, and discuss perspectives on strategies to mitigate these health risks through human settlement intervention. This study documents the development of a participatory transdisciplinary approach to urban health in rapidly urbanising Africa.

The article "Slum Health: Arrresting COVID-19 and Improving Well-Being in Urban Informal Settlements", written by Jason Corburn et al., was originally published electronically on the publisher's internet portal (currently SpringerLink) on 24 April 2020 with open access. With the author(s)' decision to step back from Open