Signal Record surge of mosquito-borne infections across Europe in summer 2025

Summary

The infectious-disease overview reports that mosquito-borne infections surged to record levels across Europe in the summer of 2025. The survey cites the outbreak as a warning of the threat that climate change poses to public health. It sits within a broader observation that new, variant and zoonotic infections are appearing at shorter intervals since COVID-19. Climate change, urbanisation and international travel are widening the speed and reach of transmission, making such outbreaks harder to contain. The case supports the survey's view that climate-sensitive infectious disease is becoming a permanent concern for health security.