Researchers have found a potential link between anomalies in sea-surface temperatures in Indian Ocean and the intensity of dengue epidemics globally.
The link is likely due to its influence on regional temperatures through teleconnections, large-scale atmospheric patterns that can transfer heat and moisture across vast distances.
Dengue is a viral infection transmitted through the bite of infected Aedes species mosquitoes.
Before 1970, severe dengue outbreaks were only reported in nine countries.
But now it affects nearly half of the world’s population, with an estimated 100–400 million infections occurring each year.