[Comment] A call to action: climate leadership at the World Health Assembly

The past decade was officially the hottest on record,1 highlighting humanity's failure to curb greenhouse gas emissions and the urgent need for decisive climate action. The scientific community and civil society demand prioritising human health in this agenda, supported by evidence on greater societal engagement and by the archetype of reliability, ethics, and responsibility embodied by health professionals.2,3 Although there is a growing awareness among health professionals and health institutions regarding the causal relationship between climate change and disease, this sector still lacks political will, funding, and infrastructure to lead ambitious and equitable response policies.