During the first five months of 2016, Sri Lankan health officials have reported 17,801 dengue fever cases, which is more than 14,479 cases reported this time inn 2015.

Aedes aegypti Image/CDC
Aedes aegypti

The Colombo district remains the hotspot with nearly 6,000 cases, followed by Gampaha with 1983 and Jaffna and Kalutara both with a little more than 1200.

The Sri Lanka Epidemiology Unit does not report dengue related fatalities anymore. However, an Apr 23 local media report put the tally at 14.

In the past 50 years, the incidence of dengue worldwide has increased 30-fold, largely as a consequence of the growth of cities and increased travel.

According to a 2013 WHO report 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.

The World Health Organization (WHO) estimates there may be 50–100 million dengue infections worldwide every year. However,there was 2013 research from the University of Oxford and the Wellcome Trust, using cartographic approaches, estimate there to be 390 million dengue infections per year worldwide.