Dengue fever is a viral infection transmitted by mosquitoes. It is endemic in tropical and subtropical regions of the world but is beginning to emerge in other regions, including Europe. Many dengue-endemic countries are popular tourist destinations, so nurses should be prepared to discuss the risks of dengue and strategies to avoid contracting it with patients who are preparing to travel.

Rachael Fletcher, travel nurse adviser, National Travel Health Network and Centre, University College London Hospitals NHS Foundation Trust, London, England