Sri Lanka Dengue Outbreak Reaches 76,044 Cases and 53 Deaths

Jul 21, 2026

Sri Lanka is battling its worst dengue outbreak in nearly a decade, with over 76,000 infections and at least 53 deaths reported since January 2026. Driven by the highly virulent DENV-2 strain, the surge has overwhelmed hospitals, forcing them to add beds and extend staff hours. To combat the spread, the government has deployed military drones to detect stagnant water on rooftops and mobilized armed forces for ground inspections, while recovering from $1.4 billion in infrastructure damage caused by Cyclone Ditwah.

Sri Lanka dengue outbreak scale

▪The dengue outbreak in Sri Lanka has resulted in at least 53 to 56 deaths since January 2026.
▪Sri Lanka is experiencing its worst dengue outbreak in nearly a decade, with over 76,000 infections reported since January 2026.
▪The National Dengue Control Unit of Sri Lanka has identified 162 divisions across the country as high-risk areas for transmission.

DENV-2 strain virulence

▪Health experts warn that the DENV-2 strain spreads rapidly and makes forecasting the end of the outbreak difficult.
▪Approximately 75 percent of the dengue cases in Sri Lanka are linked to the highly infectious and more virulent DENV-2 strain.

Military drone mosquito surveillance

▪Sri Lankan military and police personnel are inspecting homes, construction sites, and schools to eliminate mosquito breeding grounds.
▪The Sri Lankan Air Force is deploying military drones to detect stagnant rooftop pools of water where mosquitoes breed.
▪Sri Lankan authorities cleared nearly 11,000 breeding sites and fined over 4,000 premises in July 2026.

Hospital capacity strain

▪Doctors are advising dengue patients with mild symptoms to recover at home to reduce pressure on overcrowded hospitals.
▪Hospitals in Sri Lanka have added beds, converted wards, and extended staff hours to handle over 18,000 cases in the first two weeks of July 2026.

Cyclone Ditwah infrastructure damage

▪Debris left by Cyclone Ditwah created extensive mosquito breeding sites, leading to high entomological indices that contributed to the dengue surge.
▪Cyclone Ditwah, which struck Sri Lanka in late November or December, caused an estimated $1.4 billion in damage to critical infrastructure and health facilities.