Figure 2.

Location of selected studies overlaid with the map of the global dengue burden. The levels of dengue risk are based on reports from the Centers for Disease Control and Prevention, National Center for Emerging and Zoonotic Infectious Diseases, and Division of Vector-Borne Diseases [52]. “Frequent or Continuous” risk means that either frequent outbreaks occur, or transmission is ongoing. “Sporadic or Uncertain” risk means that the risk varies and is unpredictable, and that country-level data is not available. The 10 °C isotherms in the winter season were generated using the mean temperature (2 m height, world) data from January and July in the year 2018 retrieved from the ERA-Interim.