Dengue Outbreak

Traditionally, dengue in Bangladesh peaks in August or September and fades by October. In 2025, this pattern broke entirely. November became the deadliest month of the year, recording over 100 deaths. This was largely due to late, heavy rainfall in October and high humidity that extended the breeding season well into what should have been the cooler winter months.
Doctors reported an increase in Atypical Dengue or “Expanded Dengue Syndrome.” Unlike the classic bone-breaking fever, more patients in 2025 presented with complications involving the liver, brain (encephalitis), and heart (myocarditis). This made diagnosis more difficult as the symptoms often mimicked other infections.
The year saw a dangerous co-circulation of DENV-2 and DENV-3.
A notable statistical trend in 2025 was the vulnerability of the working-age male population. Males accounted for nearly 59% of all hospitalizations. Public health experts attributed this to “outdoor exposure” during work hours, as the Aedes mosquito is a daytime biter and urban construction sites remained major breeding grounds.

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