Dengue cases have increased 30-fold around the world over the past 50 years. The report describes its rise:
Between 1955 and 1959, the number of countries reporting cases of dengue increased from three to eight; in 2012, the geographical distribution of dengue included more than 125 countries. This increase underscores the need to implement sustainable prevention and control interventions rather than rely on responses to outbreaks…Although the full global burden of the disease is uncertain, the patterns are alarming both for human health and the global economy.
Read more about the WHO’s report.
Map from the WHO.