Reported tick-borne encephalitis surveillance for Switzerland (CHE) — ▲ Rising · 2025 — latest record 2026-11-03
As of 1 September 2026, Switzerland has reported 399 tick-borne encephalitis cases in 2026, as published by Federal Office of Public Health (FOPH/BAG) (1 other reporting authority also reports it). The full year 2025 closed at 505 cases. 2025 closed 30% above the 2023–2024 average, which is why the trend reads “Rising”.
Of the 8 countries reporting tick-borne encephalitis to ENCLAI in 2026, Switzerland accounts for 16.4% of reported cases and ranks 3 by case count.
ENCLAI has logged 654 surveillance records for tick-borne encephalitis in Switzerland in 2026, with the most detailed reporting in May 2026 (382 records). 38 of those arrived in the last 30 days; the case counts run to 2026-09-01. 4 distinct surveillance sources reported this pair in 2026.
Reporting authorities for these counts: ECDC Surveillance Atlas — Switzerland Region-Level (population-weighted) · Federal Office of Public Health (FOPH/BAG)
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| Year | Reported cases | Share of worldwide reports |
|---|---|---|
| 2023 | 342 | 21.6% |
| 2024 | 432 | 8.7% |
| 2025 | 505 | 12.4% |
| 2026 (year to date) | 399 | 16.4% |
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 |
|---|---|---|
| Apr 2026 | 194 | 3 |
| May 2026 | 382 | 3 |
| Jun 2026 | 11 | 2 |
| Jul 2026 | 11 | 3 |
| Aug 2026 | 9 | 3 |
| Sep 2026 | 9 | 3 |
| Oct 2026 | 9 | 3 |
| Nov 2026 | 29 | 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. 38 records were logged in the last 30 days.
Areas within Switzerland with the most tick-borne encephalitis records this year:
| Area | Records |
|---|---|
| Nordwestschweiz | 46 |
| Espace Mittelland | 44 |
| Ostschweiz | 43 |
| Zürich | 43 |
| Région lémanique | 42 |
| Country | 2026 cases | Trend |
|---|---|---|
| Poland | 905 | ≈ Stable · 2025 |
| Finland | 461 | ≈ Stable · 2025 |
| Lithuania | 378 | ▲ Rising · 2025 |
| Latvia | 155 | ≈ Stable · 2025 |
| Slovenia | 70 |
| Disease | 2026 cases | Trend |
|---|---|---|
| Seasonal influenza | 15,647 | ▲ Rising · 2025 |
| Campylobacteriosis | 7,834 | ≈ Stable · 2025 |
| Lyme borreliosis | 7,480 | ≈ Stable · 2025 |
| COVID-19 | 3,895 | ▼ Declining · 2025 |
| Non-typhoidal salmonellosis | 2,074 | ≈ Stable · 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.
