Dubbed "breakbone fever", dengue is one of the world's leading mosquito-borne illnesses and infects tens of millions across the globe annually.
Around half of the planet's population live in at-risk areas, mainly in Latin America, Africa and Asia.
So what is dengue, how does it spread, and how can it be contained?
Dengue is transmitted mainly by the Aedes Aegypti mosquito, which thrives in densely-populated tropical climates and breed in stagnant pools of water.
The mosquitoes pick up the virus from infected humans -- even asymptomatic ones -- and pass it along to other people through bites.
A massive boom in international travel and trade has expanded dengue's footprint, allowing the virus to be carried across the globe in a matter of hours and unleashed in new communities.
Its grim nickname comes from the disease's intense flu-like symptoms: severe headache, pain behind the eyes, full-body aches, high fever, nausea, vomiting, swollen glands or rash.