Dengue and the hidden economic burden

During the peak monsoon quarter, an operations manager at a Bengaluru technology company notices something unusual. It is not a sales problem or a software failure, but empty chairs.

One employee is away with a high fever. A few days later, another team member reports similar symptoms. Then someone from the support team goes on leave. Meetings are rescheduled, deadlines are redistributed, and colleagues begin absorbing work that was never supposed to be theirs.

At home, the story looks different but feels just as disruptive. A parent is arranging hospital visits. A spouse may have to take time away from work. Transport costs accumulate. Meals change during recovery. A household that had planned its monthly finances carefully suddenly has an expense it never budgeted for.

The trigger was a mosquito bite. This is what makes the economic burden of dengue fever so easy to underestimate. The mosquito is tiny, and an individual case may appear manageable. But when thousands of people become sick around the same time, the consequences move through hospitals, households, workplaces, and local economies.

Dengue therefore creates two simultaneous problems. There is the visible cost of treating illness and the less visible cost of everything that stops happening while people are sick.

Think of an urban economy like a power grid during peak demand. Losing one connection may barely be noticed. Losing several at once can affect the entire network.

Dengue creates a similar shock through lost working days, caregiver time, reduced output, and additional household spending. And once the invisible hours begin adding up across millions of people, the numbers become difficult to ignore.

Indonesia’s dengue productivity losses

Indonesia offers a striking example of what happens when individual health shocks accumulate across a large population.

A Gadjah Mada University study estimated that dengue cost Indonesia nearly Rp9 trillion in 2024. The estimate included healthcare costs as well as the broader economic consequences of dengue. More than Rp2.5 trillion was attributed to productivity losses. That distinction matters.

Suppose an employee earning a monthly salary is unable to work for several days. Their employer may still have to meet the salary obligation, while the employee contributes less output. A colleague may have to take over urgent tasks. A project may take longer. A customer may wait for a response.

For a small business owner, the impact can be even more direct. Ten days away from work may mean fewer customers served, fewer deliveries completed, and less income generated.

This is the loss of productivity cost due to dengue in practical terms. It represents the economic value of productive time that disappears because people are sick, receiving treatment, or caring for someone who is.

Health economists also use a measure called Disability Adjusted Life Years, or DALYs. The terminology sounds intimidating, but the underlying idea is straightforward. Imagine that every person has a pool of healthy, productive time. Disease takes some of that time away through illness, disability, or premature death. DALYs attempt to quantify that lost healthy life.

Productivity studies also reveal another important issue. The person with dengue is not always the only person losing productive time. Informal caregivers can lose working hours too. A parent accompanying a child or a spouse staying home with a sick partner is contributing valuable time that may never appear on a hospital invoice. A systematic review of dengue studies across Asia found that productivity costs form a substantial component of dengue's economic burden and noted that caregiver and unpaid-work losses can be underestimated.

This changes how we should think about prevention. The cost of dengue is not simply what a hospital charges. It includes the economic activity that disappears around the illness.

But Indonesia's experience raises a more interesting question. If prevention can protect both health and productivity, what would it look like to intervene before the mosquito gets a chance to create that loss?

Singapore’s Wolbachia breakthrough

Singapore took an unusual approach to that question. Instead of relying only on treating people after infection or removing mosquito breeding sites, scientists explored whether the mosquito population itself could be altered. This became Project Wolbachia.

The programme breeds male Aedes aegypti mosquitoes carrying Wolbachia, a naturally occurring bacterium. These males do not bite people. When they mate with wild female Aedes aegypti mosquitoes, the resulting eggs do not develop normally, which helps suppress the mosquito population.

The simplest way to understand the concept is to imagine a factory. If a factory is producing too many defective products, one solution is to inspect every product at the end. Another is to intervene earlier in the production process and reduce the number of defective products being created.

Project Wolbachia works on the second principle. The aim is not to chase every mosquito individually. It is to reduce the ability of the mosquito population to reproduce successfully.

Singapore has reported substantial reductions in Aedes aegypti populations in treated areas, with studies and programme reporting showing mosquito suppression of around 80 to 90 percent and significant reductions in dengue risk. 

The economic logic is equally important. Imagine a city spending money every year responding to thousands of avoidable breakdowns. It may be cheaper over time to invest in infrastructure that prevents a portion of those breakdowns from happening.

That is the public-finance question behind Project Wolbachia dengue control. The value of prevention is not limited to the infections avoided. It can include hospital capacity preserved, working days protected, and household disruption reduced.

Recent research has also examined the cost-effectiveness of Wolbachia-based dengue interventions, reflecting the growing interest in evaluating vector control not only through epidemiological outcomes but through economic value.

This does not mean technology makes dengue disappear. Vector control works alongside surveillance, community participation, and conventional mosquito-control measures.

What it does demonstrate is a change in mindset. Instead of asking only how much treatment costs after an outbreak, policymakers can ask how much economic damage can be avoided by reducing transmission beforehand.

That same distinction becomes important when we move from government budgets to household budgets. Because even when a family has insurance, dengue can still leave behind a financial gap.

The costs beyond the hospital bill

When most families think about healthcare protection, they think about the hospital bill first. That is understandable.

A hospital admission can involve room charges, diagnostics, medicines and professional fees. Health insurance can be extremely valuable in protecting a household from these major medical expenses. But dengue often creates another layer of costs outside the hospital.

Someone may need to travel repeatedly between home and hospital. A family member may need to stay nearby. A caregiver may lose wages. Recovery can involve additional food and nutrition expenses. A self-employed person may simply have no income during the days they cannot work.

These costs contribute to the indirect cost of dengue treatment. They are difficult to see because they are scattered across different parts of the household budget.

Consider a dual-income family. One partner is hospitalised with dengue. The other takes several days away from work to manage admission, communication with doctors and household responsibilities.

The family may have insurance, but insurance does not necessarily replace the second person's lost income. This is what can be called non-medical out-of-pocket leakage. Imagine repairing a leaking pipe but leaving several smaller leaks untouched. The main problem appears solved, yet water continues to disappear.

Healthcare economics faces a similar challenge. A narrow calculation that counts only medical treatment can miss the wider cost of illness.

Research into dengue productivity costs across Asia has found substantial variation between countries and episodes, but consistently highlights the importance of considering patient productivity losses and informal caregiver costs.

For families, the practical lesson is not that insurance is inadequate. It is that insurance solves one part of the financial problem. A stronger household defence combines appropriate health insurance with emergency savings and awareness of the expenses that may arise outside formal medical coverage.

That preparation becomes particularly valuable when seasonal disease risk rises. And that brings us to the part of dengue prevention that households can influence directly.

Building a monsoon health defence

A household does not need a laboratory to start reducing dengue risk.

During monsoon periods, the first line of defence is environmental. Water collecting in containers, trays, discarded objects and poorly maintained storage areas can provide breeding opportunities for Aedes mosquitoes. Regularly checking these areas and eliminating stagnant water is a simple but important part of monsoon health risk management.

The second line of defence is financial. Before a high-risk season begins, families can review their health insurance and identify what it actually covers. Check hospitalisation limits, exclusions, waiting periods, room-rent conditions and other policy-specific terms rather than assuming every healthcare expense will be reimbursed.

Then create a seasonal health buffer. It does not have to be a separate bank account. The important principle is to have readily accessible money for transport, medicines, caregiving, temporary income disruption and other unexpected expenses.

For a salaried employee, this can sit within an emergency fund. For a freelancer or business owner, the buffer may need to be larger because income itself can stop during illness.

There is also a community layer. Dengue does not respect property boundaries. A clean home surrounded by breeding sites in neighbouring areas is not fully protected. Residents, apartment associations, schools and workplaces all have a role in removing breeding opportunities.

Employers can contribute too. During periods of high transmission, organisations can encourage employees to seek medical attention early, communicate clearly about leave and avoid creating pressure for sick employees to work through illness. This matters because workforce absence due to dengue is not merely an HR statistic. It can affect project timelines, customer service, operational continuity and the workload of healthy employees.

The strongest response therefore connects three levels of protection.

• Protect health through prevention.

• Protect finances through preparation.

• Protect productivity through sensible workplace and community action.

Yet the bigger lesson only becomes visible when all three levels are viewed together.

Protecting the workforce from dengue

Return to the Bengaluru office from the opening story. The empty chairs were never simply an HR problem.

Behind every absence was a household managing uncertainty. Behind every delayed project was a person recovering. Behind every lost working day was an economic cost that rarely appeared in a single financial statement. That is why dengue deserves to be viewed through a wider lens.

The workforce absence due to dengue connects public health with productivity. The indirect cost of dengue treatment connects hospitalisation with household finances. And the economic burden of dengue fever connects individual cases with national economic performance.

Indonesia's experience puts the scale of that relationship into perspective. Singapore's experience shows how prevention can move beyond traditional approaches. Research across Asia demonstrates why productivity and caregiver losses deserve attention alongside medical spending.

None of this means every dengue case can be prevented or every economic loss eliminated. It means the definition of protection needs to become broader.

For governments, that can mean evaluating prevention by the healthcare and productivity losses it may avert. For employers, it can mean treating seasonal illness as a workforce-continuity issue rather than simply an attendance issue. For families, it can mean understanding that financial resilience during illness depends on more than an insurance card.

And for communities, it can mean recognising that mosquito control is a shared responsibility rather than a problem belonging to someone else.

A mosquito may weigh almost nothing, but its economic consequences can travel from a balcony in Bengaluru to a hospital, from a hospital to a workplace, and from thousands of workplaces into a national economy.

The most effective response is therefore not to wait for the financial damage to appear. It is to make prevention part of the financial plan before the next monsoon turns a small bite into a much larger bill.