Is dengue worse than usual in Trincomalee?

Yes. Dengue in Trincomalee is twice its usual for these weeks.

17 cases a week, against a usual 8.0.

050100usual range2026JanAprJulOctWeek 30 of 2026: 23, as printedWeek 33 of 2026: 5, as printed

Week 30: the Ministry of Health's two reports disagree (23 here, from its Epidemiology Unit; 8 in its National Dengue Control Unit's weekly update). Shown as printed.

Week 33: the Ministry of Health's two reports disagree (5 here, from its Epidemiology Unit; 15 in its National Dengue Control Unit's weekly update). Shown as printed.

Read from these four weekly reports by Epidemiology Unit, Ministry of Health, Sri Lanka:

  • 20–26 Jul 2026 (Vol 53 No 31)
  • 26 Jul–2 Aug 2026 (Vol 53 No 32)
  • 3–9 Aug 2026 (Vol 53 No 33)
  • 10–16 Aug 2026 (Vol 53 No 34)
The 8 reports behind "usual"
  • 20–26 Jul 2024 (Vol 51 No 31)
  • 27 Jul–2 Aug 2024 (Vol 51 No 32)
  • 3–9 Aug 2024 (Vol 51 No 33)
  • 10–16 Aug 2024 (Vol 51 No 34)
  • 19–25 Jul 2025 (Vol 52 No 31)
  • 26 Jul–1 Aug 2025 (Vol 52 No 32)
  • 2–8 Aug 2025 (Vol 52 No 33)
  • 9–15 Aug 2025 (Vol 52 No 34)

The publisher's own list of its weekly reports

How this is worked out. The last four weeks against the same four weeks of the two years before, for Trincomalee alone. What "usual" means.

When does dengue usually peak in Trincomalee?

Twice a year: most often around January and February (10 of 19 years), and around April and June (6).

2007: peaked in week 282008: peaked in week 82009: peaked in week 262010: peaked in week 32011: peaked in week 82012: peaked in week 22013: peaked in week 132014: peaked in week 172015: peaked in week 42016: peaked in week 522017: peaked in week 132018: peaked in week 262019: peaked in week 522020: peaked in week 42021: peaked in week 22022: peaked in week 172023: peaked in week 172024: peaked in week 22025: peaked in week 18JFMAMJJASOND

One year's peak2025Now and the next ten weeks

From 19 years of weekly reports, 2007 to 2025: each dot is the month that year's dengue peaked in Trincomalee.

How does Trincomalee compare with the rest of Sri Lanka?

Trincomalee is 21st of the 21 districts with enough cases to compare, each against its own usual.

usual⅛×8×32×country 4.7×Anuradhapura: 6.0×Badulla: 7.6×Batticaloa: 3.0×Colombo: 4.0×Galle: 5.3×Gampaha: 6.3×Hambantota: 6.7×Jaffna: 2.5×Kalmunai: 6.5×Kalutara: 7.8×Kandy: 3.5×Kegalle: 5.3×Kurunegala: 3.8×Matale: 2.8×Matara: 7.2×Monaragala: 3.8×Nuwara Eliya: 6.3×Polonnaruwa: 5.0×Puttalam: 7.0×Ratnapura: 2.6×Trincomalee: 2.1×Trincomalee

Across Sri Lanka as a whole, dengue is at 4.7× its usual; in Trincomalee it is 2.1×.

What is dengue?

An infection caused by the dengue virus, carried by mosquitoes. Most people have mild or no illness, but it can become severe.

Signs
High fever, bad headache, pain behind the eyes, aching muscles and joints, feeling sick, vomiting, swollen glands and rash. Usually lasts two to seven days.
How it spreads
Through the bite of an infected Aedes mosquito, which bites mainly in the daytime. Rarely, through blood transfusions, organ donation, or from mother to baby.
How to protect yourself
Cover up, use nets, window screens and repellent. Empty, clean and cover anything holding water weekly. A vaccine is licensed in some countries for children aged 6 to 16 in high-risk areas.
Get medical help
Get help immediately, often just after the fever drops, for bad stomach pain, repeated vomiting, fast breathing, bleeding gums or nose, blood in vomit or poo, or cold pale skin. Use paracetamol, not ibuprofen or aspirin.

In Dooram's words, from the World Health Organization. Source: WHO fact sheet: Dengue and severe dengue, read 8 October 2026. General information, not medical advice.

Dengue in every country Dooram reads ›

A reported case means someone reached a clinic and a form was filed, so these count reports, not everyone who was ill.

Sources. Epidemiology Unit, Ministry of Health, Sri Lanka, weekly report. District maps: Survey Department of Sri Lanka, published as a Common Operational Dataset by the UN Office for the Coordination of Humanitarian Affairs.