Compiled by the ENCLAI research team following a documented methodology · Editorial oversight: Dr Natalya Mathur, Founder · Data last updated: (UTC)

Invasive meningococcal disease in Norway: 2026 cases and outbreak reports

Reported invasive meningococcal disease surveillance for Norway (NOR) — — latest record 2026-05-12

What the 2026 data shows

As of 12 May 2026, Norway has reported 7 invasive meningococcal disease cases in 2026, compiled from figures published by FHI MSIS Notifiable Disease Statistics (Regional). No 2025 figure has been reported.

Of the 21 countries reporting invasive meningococcal disease to ENCLAI in 2026, Norway accounts for 0.3% of reported cases and ranks 16 by case count.

ENCLAI has logged 6 surveillance records for invasive meningococcal disease in Norway in 2026, with the most detailed reporting in Apr 2026 (4 records); the case counts run to 2026-05-12. 1 distinct surveillance sources reported this pair in 2026.

Reporting authorities for these counts: FHI MSIS Notifiable Disease Statistics (Regional)

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Surveillance summary

2026 cases (YTD)
7
2025 cases (full year)
not reported
Baseline avg (3yr)
N/A
Trend (2025)
—
No 2025 figure

Reported cases by year, Norway

YearReported casesShare of worldwide reports
2023 not reported —
2024 not reported —
2025 not reported —
2026 (year to date) 7 0.3%

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 invasive meningococcal disease 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.

Surveillance records logged in 2026

MonthRecordsReporting sources
Apr 202641
May 202621

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.

Sub-national reporting, 2026

Areas within Norway with the most invasive meningococcal disease records this year:

AreaRecords
Agder1
Rogaland1
Troms og Finnmark1
Vestfold og Telemark1
Vestland1

Invasive meningococcal disease in other countries, 2026

Country2026 casesTrend
Brazil 744 ▲ Rising · 2025
United States 516
Spain 221 ≈ Stable · 2025
Poland 125 ▲ Rising · 2025
Australia 103

Other diseases reported in Norway, 2026

Disease2026 casesTrend
Rhinovirus infection 28,069
Seasonal influenza 16,080 ▲ Rising · 2025
Respiratory syncytial virus infection 14,243 ▲ Rising · 2025
COVID-19 5,329 ▼ Declining · 2025
Human metapneumovirus infection 4,256

Questions about this page

How many invasive meningococcal disease cases has Norway reported in 2026?
As of 12 May 2026, Norway has reported 7 invasive meningococcal disease cases in 2026, compiled from figures published by FHI MSIS Notifiable Disease Statistics (Regional). No 2025 figure has been reported.
Where does Norway publish invasive meningococcal disease surveillance data?
The counts on this page were published by FHI MSIS Notifiable Disease Statistics (Regional). ENCLAI compiles and normalises them and is not affiliated with these authorities.

About this data

Figures are reported case counts as published by the originating health authorities, compiled by ENCLAI from 444 verified surveillance sources. Norway figures reflect the reporting available to ENCLAI; reporting periods and case definitions differ between sources, and a missing report does not establish zero cases. ENCLAI holds invasive meningococcal disease records for Norway dated from 2024. How we verify and update data: methodology & Trust Center · understanding case counts.

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The daily disease brief

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.

Double opt-in — we send a confirmation link and nothing else until you click it. One-click unsubscribe on every email. See our privacy notice.