Regional AlertThailand reports a nearly 500% increase in dengue in 2023 June 15, 2023By MBDS Team13 June 2023. In a follow-up on the Thailand dengue fever situation in 2023, the Bureau of Epidemiology, Department of Disease Control (DDC) reports 19,503 total cases through June 7. This is an increase of 475 percent compared the the 3386 cases reported during the same period in 2022.