 This year's World Health Day puts the spotlight on climate change as one of the biggest health threats facing humanity. An increasing number of people migrate to our displays nowadays due to the adverse effects of climate change and environmental degradation on their livelihoods, daily lives and health. As in many other crises, migrants are often particularly vulnerable to these effects, due to lack of access to preventive and curative healthcare services and social services, poor working and living conditions, or limited level of inclusion in host communities. In addition, the disruption of continuity of care when people move and the damage to available health infrastructures have a significant impact on health. As governments prepare to come together for the first international migration review form this May and the COP 27 later in the year, we must emphasize the need for timely research and evidence on the links between climate change, health and migration. This will help build health resilience in communities and health systems that are equipped to respond to the needs of migrants and mobile populations. The only way to guarantee a healthier tomorrow for all is by ensuring universal health coverage. Equitable access to healthcare services is needed for all migrants, now more than ever. There is no public health without migrant health.