Influenza Activity Surges Across Norway
Norway is currently facing a sharp increase in influenza cases, leading to a notable rise in hospital admissions. According to the Norwegian Institute of Public Health (FHI), the number of influenza-related hospitalizations climbed to 438 in week 49 of 2025, a substantial increase from 289 admissions reported in week 48. This surge indicates a rapidly developing outbreak, prompting health authorities to advise hospitals and municipalities to prepare for a continued rise in patient numbers.
Dominant Virus and Affected Demographics
The FHI's latest report, updated on December 11, 2025, highlights that Influenza A virus is currently dominating the outbreak. Among the subtyped viruses, H3N2 is showing the most significant increase and constitutes the clear majority in regions where the outbreak is most advanced. Approximately 94% of the H3N2 viruses identified are of the K-variant.
The incidence of influenza is increasing across all age groups, with schoolchildren aged 5-14 years experiencing the highest rates, showing 47% positive samples.
Geographical Spread and Public Health Response
The influenza outbreak is not uniform across Norway, with several counties reporting a continued increase in cases. The highest influenza occurrences have been noted in:
- Akershus (33% positive samples, up from 23%)
- Oslo (32% positive samples, up from 27%)
- Østfold (32% positive samples, up from 20%)
- Møre og Romsdal (28% positive samples, up from 21%)
The percentage of samples testing positive for influenza virus rose to 23% in week 49, up from 16% in week 48, underscoring the escalating situation. Tragically, the FHI also reported 17 deaths associated with influenza in week 49, an increase from 8 in the preceding week.
In response to the developing situation, vaccination efforts continue. As of December 7, 2025, 67% of individuals aged 65 and older have received their influenza vaccination since the campaign began on August 25, 2025.
5 Comments
Africa
While the article highlights a worrying spike in influenza cases and deaths, it also shows that 67% of the elderly population is vaccinated. This suggests that targeted vaccination campaigns can be effective, but broader public engagement is clearly needed.
Bermudez
It's alarming to see the death toll double in just one week, underscoring the severity of this flu season. Yet, the article doesn't detail what specific new measures hospitals are implementing beyond just being advised to prepare.
Muchacho
The sharp increase in cases is concerning, particularly the rise in hospitalizations. However, it's positive that the FHI is providing clear data and advising preparations, which indicates a structured response.
Habibi
Crucial information, especially knowing H3N2 K-variant is dominant.
Mariposa
The geographical spread details are interesting, but does it really change anything for the average person?