Mosquito-borne diseases like dengue fever are spreading due to climate change, globalisation, and urbanisation. This film follows Dr Rachel Lowe, a Royal Society Dorothy Hodgkin Fellow, as she uses supercomputers to analyse climate, trade, and sanitation data to predict outbreaks before they occur. By understanding how mosquitoes thrive — from water containers to traded car tyres — her research aims to save lives and build resilience against future epidemics.