BMC Health Services Research is calling for submissions to our Collection on Effect of climate change on inequities in healthcare and on (vulnerable) health systems.Climate change is intensifying global health disparities, especially among marginalized populations and vulnerable healthcare systems. This collection invites original research, systematic reviews, and scoping reviews on the health impacts of climate change, with a focus on healthcare inequities and system resilience. Topics include health disparities, access to care, resilience in low-income regions, environmental determinants, adaptation strategies, policy interventions, technology’s role, and case studies on climate change and health equity. Contribute your research to address this critical issue.