Protecting children cannot rely on a single measure.
As the El Niño climate pattern stretches toward the close of 2026, Indonesia finds itself in a prolonged confrontation with dengue fever — a disease that thrives wherever warmth and standing water invite the Aedes aegypti mosquito to multiply. Medical authorities project more than two million Indonesians will require treatment this year, a figure that reflects not merely a public health emergency but a reminder that climate and human vulnerability are deeply intertwined. The burden falls unevenly yet broadly: children make up the largest share of fatalities, while adults with undiagnosed conditions often discover their fragility only when dengue forces the revelation. What experts urge is not alarm but sustained, layered attention — the kind of quiet, year-round care that outlasts any single season.
- El Niño's extended warmth is expanding mosquito habitats across Indonesia's vast archipelago, pushing dengue transmission into communities and seasons where it was once less common.
- Over two million Indonesians are projected to need dengue treatment in 2026 alone, and 41% of deaths over the past seven years have been children between the ages of five and fourteen.
- Adults face a hidden danger: many discover serious underlying conditions — diabetes, hypertension, kidney disease — only after dengue triggers life-threatening complications, with risk multipliers ranging from two to twelve times that of healthy individuals.
- Health authorities are pushing a layered defense combining vaccination, the community-wide 3M mosquito eradication approach, protective clothing, and early symptom recognition — rejecting any single-measure solution.
- The country is navigating toward year-round vigilance rather than seasonal response, with medical societies urging both pediatric and adult patients to consult physicians about vaccination as a core part of preventive care.
Indonesia is confronting a sustained dengue fever surge as the El Niño phenomenon, expected to persist through the end of 2026, creates ideal conditions for the Aedes aegypti mosquito to spread across the archipelago. A Gadjah Mada University study projects more than two million Indonesians will need treatment this year, and the human cost is already etched into seven years of mortality data: 41 percent of dengue deaths have occurred among children aged five to fourteen.
Yet children are not the only population at risk. Adults managing chronic illnesses — hypertension, diabetes, kidney disease, chronic lung conditions — face dramatically elevated dangers, with complication risks ranging from two to twelve times higher than those without underlying conditions. Physicians note a troubling pattern: many patients learn of their undiagnosed conditions only after dengue sends them to the hospital.
Hartono Gunardi of the Indonesian Pediatric Society urged parents at a Jakarta health event in mid-June to dress children in long-sleeved, brightly colored clothing during outdoor play, when mosquitoes are most active, and to apply insect repellent with care. He stressed that no single measure is sufficient — vaccination, community mosquito eradication through the 3M approach, and early symptom recognition must work together.
Sukamto Koesnoe of the Indonesian Society of Internal Medicine Physicians echoed that message for adults, emphasizing that even people who feel entirely healthy can develop severe dengue. Medical authorities across the board are calling for year-round vigilance — early detection of fever, headache, body aches, and rash — rather than the seasonal bursts of concern that leave communities exposed during quieter months. As Indonesia navigates a climate pattern that favors the disease's spread, layered and consistent protection remains the clearest path forward.
Indonesia is bracing for a surge in dengue fever cases as the El Niño phenomenon persists through the end of 2026, creating ideal conditions for the Aedes aegypti mosquito to thrive. Warmer temperatures expand the mosquito's habitat across the archipelago, and medical experts warn that the disease threatens every demographic—from infants to the elderly, from the perfectly healthy to those managing chronic illnesses.
A study from Gadjah Mada University projects that more than two million Indonesians will need treatment for dengue this year alone, a figure likely to climb as El Niño conditions intensify. The human toll is already visible in the data: over the past seven years, 41 percent of dengue-related deaths have occurred in children between five and fourteen years old. Yet children are far from the only vulnerable population. Adults with underlying conditions—hypertension, diabetes, kidney disease, chronic lung ailments—face dramatically elevated risks of severe complications and death.
Hartono Gunardi, who chairs the Indonesian Pediatric Society's immunization task force, emphasizes that dengue is no longer a seasonal concern requiring seasonal precautions. Speaking at a public health event in Jakarta in mid-June, he outlined a layered defense: parents should dress children in long-sleeved, brightly colored clothing when they play outdoors, since the mosquitoes that carry dengue are most active in morning and afternoon hours and are attracted to dark colors. Insect repellent can help, though it should be applied conservatively. Beyond these immediate measures, Gunardi advocates for the 3M eradication approach—a community-wide effort to eliminate mosquito breeding grounds—combined with vaccination and early symptom recognition. "Protecting children cannot rely on a single measure," he said, stressing that a comprehensive strategy including vaccination can meaningfully reduce hospitalizations and severe complications.
The threat extends equally to adults, though it often arrives disguised. Sukamto Koesnoe, who leads the adult immunization task force of the Indonesian Society of Internal Medicine Physicians, notes that many patients discover serious underlying health conditions only after being hospitalized with dengue. A person might feel entirely well, unaware of undiagnosed hypertension or diabetes, until dengue infection triggers a cascade of complications. The numbers are sobering: hypertensive patients face two to three times the risk of severe dengue compared to those without comorbidities. For diabetics, that risk jumps to three to five times. Kidney disease patients face up to seven times the risk, while those with asthma or chronic lung disease can face anywhere from two to twelve times higher risk. Yet Koesnoe is careful to note that even people without any known health conditions can develop severe, life-threatening dengue.
The path forward, according to medical authorities, requires sustained vigilance year-round rather than seasonal panic followed by neglect. Early detection of symptoms—fever, headache, body aches, rash—matters as much as mosquito eradication and vaccination. Healthcare providers recommend that high-risk individuals, particularly those with chronic conditions, consult with physicians about dengue vaccination as part of their preventive care. Community education campaigns continue to emphasize that no single intervention—not vaccination alone, not mosquito control alone, not protective clothing alone—can eliminate the risk. Instead, layered defenses, maintained consistently throughout the year, offer the best protection as Indonesia navigates an extended period of climate conditions that favor the disease's spread.
Citações Notáveis
Dengue-carrying mosquitoes are most active in the morning and afternoon. When children are outdoors, dress them in long-sleeved, brightly colored clothing, as mosquitoes are drawn to dark colors.— Hartono Gunardi, Chair of the Indonesian Pediatric Society's Child Immunization Task Force
Having comorbidities certainly increases the risk. However, that does not mean those who feel healthy and have no comorbidities are safe from risk of severe dengue.— Sukamto Koesnoe, Chair of the Adult Immunization Task Force of the Indonesian Society of Internal Medicine Physicians
A Conversa do Hearth Outra perspectiva sobre a história
Why does El Niño specifically make dengue worse in Indonesia?
Warmer temperatures expand where the Aedes aegypti mosquito can survive and breed. El Niño drives up ambient heat across the region, effectively opening new territory for the mosquito to colonize. It's not just that more mosquitoes hatch—it's that they can now thrive in places they couldn't before.
The study mentions two million patients needing treatment. Does that mean two million cases, or something else?
It means two million people will require medical care for dengue during 2026. Some will be outpatient visits, others hospitalizations. The projection was made before El Niño's full impact became clear, so the actual number could be higher.
Why do children aged 5 to 14 account for such a large share of deaths?
That's the age group where dengue complications tend to be most severe and most fatal. It's not that older children are more likely to catch it—it's that when they do, the disease progresses more dangerously. The data spans seven years, so it reflects a consistent pattern.
The expert says even healthy people can die from dengue. How common is that?
It happens, but it's less common than severe dengue in people with comorbidities. The point he's making is that you can't assume you're safe just because you feel well and have no diagnosed health conditions. Some people have undiagnosed hypertension or diabetes and don't know it until dengue forces them into the hospital.
What's the 3M approach?
The source doesn't spell it out, but it's a standard Indonesian public health campaign for mosquito control—typically referring to draining standing water, covering water containers, and burying trash. It's about eliminating breeding grounds.
Is the dengue vaccine new?
The source doesn't say it's new. It's being recommended as part of childhood immunization by the pediatric society, and adults are being advised to consult doctors about it. The emphasis is on making vaccination part of routine preventive care, not treating it as an emergency measure.