Accurate risk analysis and allocation of resources for dengue control depends on disease surveillance. Dengue surveillance is similarly complex and depends in most areas on formal surveillance systems that capture case counts (or via syndromic surveillance at sentinel sites) [7, 8] . Laboratory reporting of serology can confirm not only individual cases but identify the viral serotypes found in a given area at a point in time [9] . Analysis of mosquito populations can also confirm dengue circulation and provide information on viral types [10] [11] [12] . Formal surveillance has many advantages: precise counts of case numbers, good geographic localization and the potential to identify precise disease etiology among them.