Sri Lanka dengue cases reach 99,343, with 76 deaths reported in 2026
Disease
How the score is calculated
The score starts at 8. It adds points from recorded affected, deaths, displaced and casualty counts, plus terms found in the story title, event type or status. For each count, only its highest matching band is used.
- Affected people
- 1–999: +5 · 1,000–9,999: +12 · 10,000–99,999: +20 · 100,000–999,999: +28 · 1 million+: +35
- Deaths
- 1–9: +8 · 10–99: +14 · 100–999: +22 · 1,000+: +30
- Displaced people
- 1–9,999: +6 · 10,000–99,999: +12 · 100,000+: +18
- Casualties
- 100 or more: +8
- Story wording
- +10 for terms such as catastrophe, famine, war, conflict, major earthquake, mass casualty or critical. Otherwise, +5 for active, ongoing, emergency, outbreak, cyclone or hurricane.
Score bands: Watch 0–24 · Moderate 25–49 · High 50–74 · Critical 75–100. Scores are capped at 100. Missing or unparseable figures add no points.
This is a rule-based WorldsAid triage indicator, not an official or independently validated classification. It does not account for recency or local context, and it can understate events with incomplete reporting. Check the linked sources.
In brief
- What happenedSri Lanka's National Dengue Control Unit reported 99,343 dengue cases and 76 deaths in 2026 as of midnight on 22 September.
- How many affectedAffected persons: 99,343 · Deaths: 76 · Dengue cases reported in 2026: 99,343 · as of midnight 22 September 2026
- What help is neededThe national case-fatality rate was 0.077 per cent, and 34 Medical Officer of Health areas were classified as high risk during epidemiological week 37.
What changed
Updated verified snapshot
This record was first dated 2026-09-20 and last verified 2026-09-23T05:08:56Z.
Situation
Sri Lanka's National Dengue Control Unit reported 99,343 dengue cases and 76 deaths in 2026 as of midnight on 22 September. The national case-fatality rate was 0.077 per cent, and 34 Medical Officer of Health areas were classified as high risk during epidemiological week 37. The Western Province accounted for 52,226 cases, or 52.57 per cent of the national total. Gampaha recorded 21,078 cases and Colombo District recorded 19,533.
The 20 September daily update recorded 98,912 cases and 75 deaths; the 22 September report therefore adds 431 cases and one death to the latest retained observation. The earlier week 37 surveillance snapshot recorded 97,637 cases and 74 deaths. Week 37 recorded 1,156 suspected cases across 25 districts, compared with 1,152 in week 36, a 0.35 per cent increase. The average midnight total across 73 sentinel hospitals was 447 dengue patients. These are surveillance figures and may be revised when delayed hospital reports, duplicate records or inter-district transfers are reconciled.
National and local health teams continue surveillance, vector-control activity, clinical care and risk-area monitoring. People in affected areas should follow current Ministry of Health advice on removing mosquito breeding sites and seek prompt medical assessment for symptoms consistent with dengue.
WorldsAid verification
A WorldsAid editor reviewed this record against 5 attributed sources, cleaned feed formatting and checked the event, place and reporting date. 10 human-impact figures were separated from the narrative and dated where the source allowed. Earlier observations remain in the evidence history instead of being silently overwritten.
Verified figures
- Affected persons
- 99,343 retained at 2026-09-23T05:08:56Z
- Deaths
- 76 retained at 2026-09-23T05:08:56Z
- Dengue cases reported in 2026
- 99,343 · as of midnight 22 September 2026 retained at 2026-09-23T05:08:56Z
- Dengue deaths reported in 2026
- 76 retained at 2026-09-23T05:08:56Z
- Case-fatality rate
- 0.077% retained at 2026-09-23T05:08:56Z
- Cases reported in September
- 3,853 through 22 September retained at 2026-09-23T05:08:56Z
- High-risk health areas
- 34 Medical Officer of Health areas · week 37 retained at 2026-09-23T05:08:56Z
- Western Province cases
- 52,226 · 52.57% of the national total retained at 2026-09-23T05:08:56Z
- Week 37 suspected cases
- 1,156 across 25 districts · 0.35% increase from week 36 retained at 2026-09-23T05:08:56Z
- Average midnight hospital total
- 447 dengue patients across 73 sentinel hospitals · week 37 retained at 2026-09-23T05:08:56Z
What we knew when
- WorldsAid record entered the retained historical dataset.
- WEEK 37 SURVEILLANCE · 97,637 CASES · 74 DEATHS preserved as a dated, source-linked observation. Source
- DAILY SURVEILLANCE · 98,912 CASES · 75 DEATHS · 34 HIGH-RISK HEALTH AREAS preserved as a dated, source-linked observation. Source
- DAILY SURVEILLANCE · 99,343 CASES · 76 DEATHS · 34 HIGH-RISK HEALTH AREAS preserved as a dated, source-linked observation. Source
Earlier figures are never replaced by later values; additional observations are retained as new ledger entries.
Provenance
This page renders the last verified WorldsAid cache directly in HTML. It does not treat generated summaries as primary evidence.
Cached dataset: worldsai_drup771.sql.gz
Verified
SHA-256 8bff9bb2f6c4241bde92a41c476161003f662d84ebee636f2cc1596dd53ebcbc- Sri Lanka National Dengue Control Unit · Current status as of 20 September 2026 midnight
- Government of Sri Lanka · Daily dengue surveillance infographic · 20 September 2026
- Sri Lanka National Dengue Control Unit · Weekly Dengue Update, week 37
- Sri Lanka National Dengue Control Unit · Current status as of 22 September 2026 midnight
- Government of Sri Lanka · Daily dengue surveillance infographic · 22 September 2026