Reported tick-borne encephalitis surveillance for Finland (FIN) — ≈ Stable · 2025 — latest record 2026-11-07
As of 6 November 2026, Finland has reported 461 tick-borne encephalitis cases in 2026, as published by THL Suomi (1 other reporting authority also reports it). The full year 2025 closed at 157 cases. 2025 closed 2% above the 2023–2024 average, which is why the trend reads “≈ Stable”.
Of the 8 countries reporting tick-borne encephalitis to ENCLAI in 2026, Finland accounts for 18.9% of reported cases and ranks 2 by case count.
ENCLAI has logged 248 surveillance records for tick-borne encephalitis in Finland in 2026, with the most detailed reporting in May 2026 (177 records). 19 of those arrived in the last 30 days; the case counts run to 2026-11-06. 3 distinct surveillance sources reported this pair in 2026.
Reporting authorities for these counts: Terveyden ja hyvinvoinnin laitos (Finnish Institute for Health and Welfare) · THL Suomi — tartuntatautirekisteri (JSON-stat)
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| Year | Reported cases | Share of worldwide reports |
|---|---|---|
| 2023 | 145 | 9.1% |
| 2024 | 162 | 3.3% |
| 2025 | 157 | 3.9% |
| 2026 (year to date) | 461 | 18.9% |
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 tick-borne encephalitis 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 | 177 | 1 |
| Jun 2026 | 8 | 1 |
| Jul 2026 | 1 | 1 |
| Aug 2026 | 31 | 1 |
| Sep 2026 | 11 | 1 |
| Oct 2026 | 16 | 1 |
| Nov 2026 | 4 | 2 |
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. 19 records were logged in the last 30 days.
Areas within Finland with the most tick-borne encephalitis records this year:
| Area | Records |
|---|---|
| Uusimaa | 31 |
| Southwest Finland | 26 |
| North Savo | 20 |
| North Ostrobothnia | 19 |
| Åland | 16 |
| Country | 2026 cases | Trend |
|---|---|---|
| Poland | 905 | ≈ Stable · 2025 |
| Switzerland | 399 | ▲ Rising · 2025 |
| Lithuania | 378 | ▲ Rising · 2025 |
| Latvia | 155 | ≈ Stable · 2025 |
| Slovenia | 70 |
| 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.
