Dengue typically affects tropical regions ' but the disease is currently surging in parts of southern Europe, spreading among people there and reaching areas where it had not been recorded previously. The mosquito-borne disease, which can cause fever, headaches and fatigue, and kills as many as 40,000 people each year, is not endemic to mainland Europe. Most incidences or small outbreaks originate from travellers who are infected abroad and bring the virus back. But this year, a combination of warm weather conditions and an increase in the number of imported cases has sparked a surge in local infections carried by tiger mosquitoes (Aedes albopictus), which inhabit southern Europe. Several factors are contributing to the rise in locally transmitted instances of dengue, researchers say. The resumption of international travel after the COVID19 pandemic has brought more travellers back from dengue-endemic areas. As of 27 October, France reported 1,414 imported instances of dengue; in...
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