The spread of an urban mosquito in East Africa that is immune to insecticide is causing a surge in malaria cases, potentially reversing progress made against the disease. Africa accounted for 95% of global malaria cases and deaths in 2022, with children under five accounting for 80% of deaths. The invasive species of mosquito, Anopheles stephensi, was first spotted in Djibouti in 2012 and has since spread to Ethiopia, leading to a significant increase in malaria cases. Unlike other species, stephensi thrives in urban areas and is resistant to insecticides, making bed nets less effective.