Dengue in Bangladesh is no longer a temporary or seasonal health inconvenience; it has evolved into a persistent, multi-faceted public health crisis and a heavy burden on the national economy.
According to the Directorate General of Health Services (DGHS) dengue dashboard, over 107,000 individuals have been hospitalized, and more than 331 deaths have been officially documented as of October 15, 2026. With approximately 2,000 new patients admitted daily, the strain on the healthcare system is overwhelming.
Major tertiary hospitals in Dhaka and urban hubs are facing severe shortages of hospital beds and intensive care unit (ICU) capacities. Relatives face frantic scrambles for blood platelets, revealing the systemic fragility of urban medical infrastructure.
These alarming conditions highlight a critical truth: Reactive clinical management after people fall ill, paired with ad-hoc vector control drives, cannot control the transmission chain.
What Bangladesh urgently requires is a year-round, evidence-based preventive policy anchored in a coordinated national framework.
The uninterrupted spread of dengue is deeply intertwined with climate change, unplanned rapid urbanization, chronic waterlogging, and inadequate municipal waste management.
Global environmental and epidemiological research demonstrates that climate volatility, characterized by rising mean temperatures, erratic unseasonal precipitation, and elevated atmospheric humidity, dramatically accelerates the breeding cycles and vector efficiency of Aedes mosquitoes.
Under higher ambient temperatures, the duration required for the dengue virus to replicate inside the mosquito and reach its salivary glands, is significantly shortened. Consequently, an infected female Aedes mosquito becomes capable of transmitting the pathogen to human hosts much faster and more frequently within its lifespan.
Concurrently, urban environments proliferate with artificial micro-habitats. Construction sites, poorly designed drainage infrastructure, discarded single-use plastics, and poorly maintained rooftop gardens collect stagnant water, offering ideal breeding conditions.
Relying exclusively on hospital-centred curative care to address what is inherently an environmental and eco-climatic phenomenon is inherently flawed.
For decades, vector control efforts in Bangladesh have remained stubbornly reactive. Intervention plans are typically mobilized only after hospital admissions surge to crisis levels, taking the form of temporary fogging drives or hospital bed expansions.
Yet, such reactive measures fail to answer fundamental operational questions:
- Where are mosquito breeding hot spots densest?
- Which neighbourhood blocks face the highest immediate risk?
- Is the chemical insecticide sprayed by city corporations still biologically effective against local vector populations?
Indiscriminate fogging without routine entomological monitoring wastes municipal resources and damages urban ecosystems, killing beneficial non-target insects while accelerating insecticide resistance in Aedes vectors.
Transitioning from reactive fogging to sustainable vector management demands source reduction, routine larvicidal suppression, systematic waste removal, and targeted bio-control methods.
In this complex landscape, the 'One Health' framework offers the most viable path forward. One Health is an integrated, unifying approach that recognizes the intrinsic interdependence of human health, animal health, and the shared environment.
While dengue is not directly transmitted from animals to humans, it is a vector-borne viral disease reliant on the interaction between human hosts, viral pathogens, mosquito vectors, and ambient environmental conditions.
Applying One Health to dengue control means treating vector ecology, climatic dynamics, human mobility, and urban sanitation as a single interconnected ecosystem.
It breaks down traditional administrative silos, bringing together public health physicians, specialists, medical entomologists, environmental scientists, climate researchers, urban planners, and municipal engineers onto a unified operational platform.
The government recently formed a high-level special taskforce comprising representatives across various ministries and authorities to oversee mosquito-borne disease management, a commendable administrative step.
However, to translate policy into measurable health outcomes, this taskforce must move beyond administrative governance and actively embed the One Health framework into its operational core, with entomologists, climate specialists, and One Health practitioners needing to hold direct scientific advisory roles.
Crucially, Bangladesh needs a predictive national early warning and surveillance system that synthesizes real-time meteorological forecasts, rainfall patterns, vector density indices, larval mapping, and clinical hospitalization data.
Analyzing these spatial data streams will allow authorities to forecast outbreak clusters weeks before human cases spike, shifting intervention efforts from reactive crisis management to pre-emptive prevention.
Academic institutions and research centres must also be integrated into local intervention trials to evaluate the efficacy of eco-friendly larvicides and biological vector suppression tools tailored to micro-climatic zones.
Community participation remains vital to sustaining these interventions. Public awareness campaigns must empower citizens to inspect their surroundings, eliminate standing water, dispose of water-retaining trash, and neutralize mosquito breeding sites around homes.
However, civic responsibility must not serve as an excuse for institutional inaction. Local municipal authorities bear the primary obligation to ensure reliable solid waste collection, maintain open drainage canals, prevent waterlogging, and enforce environmental compliance across urban construction projects.
Controlling dengue demands a departure from fragmented, seasonal measures in favour of a long-term, science-driven, and accountable national strategy.
Clinical preparedness must be balanced with environmental management, integrated surveillance, and robust inter-ministerial coordination.
Ultimately, the success of national dengue control must not be measured by how many hospital beds are arranged to treat the sick, but by how many infections are prevented, how many vector breeding sites are permanently eliminated, and how many lives are protected.
Without a structural transition to a One Health paradigm, Bangladesh will remain trapped in a recurring cycle of preventable loss of life and severe economic strain year after year.
Professor Dr KBM Saiful Islam is the former Dean of the Faculty of Animal Science & Veterinary Medicine and former Chairman of the Department of Medicine & Public Health at Sher‑e‑Bangla Agricultural University. He previously served as a member of the National Coordination Committee of One Health Bangladesh.
