Country surveillance profile
Mosquito-borne disease in Norway — 2025–2026 data
As of 17 June 2026, Mosticare tracks Norway surveillance for West Nile virus. No autochthonous human cases are reported year-to-date in 2026. Each figure cites the responsible national or EU authority.
Last updated · 17 June 2026 · CC BY 4.0
The data
| Country / region | Disease | Cases | Deaths | Period | Source | Updated |
|---|---|---|---|---|---|---|
| Norway | West Nile virus | 0 | 0 | 2025 transmission season | European Centre for Disease Prevention and Control (ECDC) — 2025 end-of-season West Nile virus surveillance (data to 3 December 2025) | 17 June 2026 |
About surveillance in Norway
According to the European Centre for Disease Prevention and Control (ECDC), Norway reported zero autochthonous human West Nile virus cases in the 2025 season and is not among the 14 European countries that did. ECDC VectorNet records neither Aedes albopictus nor Aedes aegypti as established in Norway. National surveillance is run by the Norwegian Institute of Public Health (Folkehelseinstituttet) through the MSIS system.
Frequently asked questions
What mosquito-borne diseases is Norway monitoring in 2026?
Mosticare tracks Norway surveillance for West Nile virus, each sourced to the responsible national authority or ECDC.
Is there West Nile virus in Norway?
No locally-acquired human West Nile virus cases were reported in Norway in 2025. According to ECDC, Norway is not among the 14 EU/EEA and neighbouring countries (such as Italy, Greece, France, Romania and Spain) that reported autochthonous human cases that season. WNV is not known to circulate in Norway.
Are tiger mosquitoes (Aedes albopictus) established in Norway?
No. ECDC's June 2025 VectorNet distribution map lists the 16 EU/EEA countries where Aedes albopictus is established, and Norway is not among them. The species is not recorded as established or introduced in Norway or the wider Nordic region.
Which authority monitors mosquito-borne diseases in Norway?
The Norwegian Institute of Public Health (Folkehelseinstituttet, NIPH) is the national authority. It runs the Norwegian Surveillance System for Communicable Diseases (MSIS), under which West Nile fever is a notifiable disease, and contributes data to ECDC's European surveillance.
Was there any dengue or chikungunya in Norway in 2025?
No autochthonous (locally-acquired) dengue or chikungunya was reported in Norway in 2025. ECDC recorded such locally-acquired cases only in warmer southern areas with an established Aedes albopictus population, chiefly France, Italy and Portugal, plus the French outermost regions.
Sources
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About this data
Mosticare aggregates and re-publishes vector-borne disease surveillance from ECDC, EFSA, and national ministries of health. Mosticare is an aggregator, not a primary surveillance authority — every figure on this page cites the originating source and is independently verifiable. This is a partial aggregation; for the complete EU/EEA totals, ECDC is the primary source.
The data behind this page is published as free, machine-readable feeds under CC BY 4.0 — the point-in-time incidence snapshot at /threat-map/feed.json (JSON Schema) and the multi-year trends at /threat-map/feed/trends.json (JSON Schema). See the live Europe threat map and the full data room.