As many as 100 million people are infected yearly by any one of four related dengue viruses transmitted by mosquitoes. Dengue infection is a leading cause of illness and death in the tropics and subtropics. More than one-third of the world’s population live in areas at risk of transmission. 

The map shows study sites in the Mekong region where dengue virus was reported in one or more of the 146 published studies reviewed during the pilot study.

Guide to using the map:

The colour of a map marker indicates the percentage of samples found to be positive for the identified bacterium or virus. For example, a purple marker indicates no positive cases found; a red marker indicates that more than 30% samples were positive.

Click on a map marker to view basic descriptive data including study type, frequency of a positive result and the study citation.

If you have any questions about the data, please email info [at] wwarn [dot] org