Reported dengue fever surveillance for Finland (FIN) — ▼ Declining · 2025 — latest record 2026-10-31
As of 1 October 2026, Finland has reported 31 dengue fever cases in 2026, compiled from figures published by Terveyden ja hyvinvoinnin laitos (Finnish Institute for Health and Welfare). The full year 2025 closed at 32 cases. 2025 closed 52% below the 2023–2024 average, which is why the trend reads “Declining”.
Of the 43 countries reporting dengue fever to ENCLAI in 2026, Finland accounts for 0.0% of reported cases and ranks 34 by case count.
ENCLAI has logged 139 surveillance records for dengue fever in Finland in 2026, with the most detailed reporting in May 2026 (91 records). 42 of those arrived in the last 30 days; the case counts run to 2026-10-01. 1 distinct surveillance sources reported this pair in 2026.
Reporting authorities for these counts: Terveyden ja hyvinvoinnin laitos (Finnish Institute for Health and Welfare)
Cited reference facts about the disease, not derived from the surveillance counts on this page. Full set on the Dengue fever page.
One email a day: what changed in official disease reporting worldwide, with the source named for every number. Reported facts only — no forecasts and no interpretation.
| Year | Reported cases | Share of worldwide reports |
|---|---|---|
| 2023 | 53 | 0.0% |
| 2024 | 80 | 0.0% |
| 2025 | 32 | 0.0% |
| 2026 (year to date) | 31 | 0.0% |
Reporting bounds and case definitions vary; historical baselines are a separate comparison measure. Worldwide share compares this country's reported figure with the sum of all countries reporting dengue fever to ENCLAI for that year. "Incomplete year" means our sources cover less than ten months of that year, so no full-year figure is shown; "outbreak total to date" is a running total since an outbreak began, not a count for one year.
| Month | Records | Reporting sources |
|---|---|---|
| May 2026 | 91 | 1 |
| Jun 2026 | 1 | 1 |
| Aug 2026 | 3 | 1 |
| Sep 2026 | 2 | 1 |
| Oct 2026 | 42 | 1 |
A record is one dated surveillance publication or one row of an official table; a month with many records is a month with detailed reporting, not necessarily more cases. 42 records were logged in the last 30 days.
Areas within Finland with the most dengue fever records this year:
| Area | Records |
|---|---|
| Uusimaa | 44 |
| Southwest Finland | 16 |
| Pirkanmaa | 11 |
| North Ostrobothnia | 8 |
| Central Finland | 4 |
| Country | 2026 cases | Trend |
|---|---|---|
| Brazil | 385,610 | ▼ Declining · 2025 |
| Vietnam | 131,202 | |
| Bangladesh | 115,617 | |
| Colombia | 97,678 | |
| Sri Lanka | 93,420 |
| Disease | 2026 cases | Trend |
|---|---|---|
| Seasonal influenza | 24,771 | ▲ Rising · 2025 |
| Chlamydia infection | 5,488 | ▼ Declining · 2025 |
| Respiratory syncytial virus infection | 4,364 | ▲ Rising · 2025 |
| Norovirus gastroenteritis | 3,289 | ▲ Rising · 2025 |
| COVID-19 | 2,938 | ▼ Declining · 2025 |
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One email a day: what changed in official disease reporting worldwide, with the source named for every number. Reported facts only — no forecasts and no interpretation.
