Dengue is the most widespread mosquito-borne virus in the world. It affects 390 million people per year and kills nearly 70 people per day. The World Health Organization (WHO) ranks dengue among its top 10 global health threats in 2019.

In 70 years, the population of the mosquitoes Aedes Aegypti and Aedes Albopictus, vectors of dengue, has increased by 9.1% and 11.1%. Their territory has expanded, driven by excessive urbanization, climate change and globalization. Air traffic, which increased by more than 6% in 2018, is facilitating its expansion. Dengue is now present in 128 countries, threatening 40% of the world's population.

When it comes in its severe form - most often in a second infection of a different serotype - this virus can cause platelet loss and hemorrhagic fever. For the moment, there is no cure.

Between October 2018 and February 2019, I documented the causes and consequences of dengue in four regions of the world.

This project was funded by the Wellcome Trust.