Berlin, Germany – After more than 12 weeks, France has officially declared the end of the seasonal influenza epidemic across most of the country, marking a significant turning point in public health this winter. The announcement, made by Santé Publique France on February 25, 2026, indicates a widespread decline in influenza indicators across all age groups. While the epidemic isn’t entirely over – pockets remain in overseas territories – the news offers a welcome respite after a season marked by two successive waves of infection. This year’s flu season saw a particularly strong circulation of the influenza A virus, specifically the H3N2 subtype and its K clade, prompting increased vigilance and a renewed focus on vaccination efforts.
The decline in cases is evident across the nation, with nine regions now classified as “post-epidemic” and four having returned to baseline levels, according to the latest surveillance bulletin. The epidemic initially began in late November 2025 in Île-de-France, Normandy, and Nouvelle-Aquitaine. The situation in overseas territories remains varied, with the Antilles and Guyane still experiencing active outbreaks, while Mayotte is in the post-epidemic phase and Réunion has returned to baseline levels. This geographic variation underscores the importance of continued monitoring and targeted public health interventions.
Flu Season 2025-2026: A Look at the Viral Landscape
While a definitive assessment of the season’s impact is still underway, preliminary data reveals the co-circulation of two influenza A subtypes: A(H3N2) and A(H1N1). Notably, the H3N2 subtype, particularly the K clade, was dominant throughout the epidemic. The emergence of the K clade, also widely detected in countries like the United Kingdom, contributed to an earlier and more severe epidemic, according to health officials. Dr. Hans Henri P. Kluge, Regional Director of the World Health Organization for Europe, has noted that while influenza returns annually, this year presented a “slightly different” challenge due to this variant.
The effectiveness of this year’s influenza vaccine against the circulating strains was estimated at 36%, which is considered higher than anticipated given the prevalence of the K clade. However, experts emphasize that even with moderate effectiveness, vaccination remains the most effective way to protect against severe illness, hospitalization, and death. The importance of vaccination is further highlighted by data showing that 72% of individuals admitted to intensive care units with influenza had not been vaccinated.
Increased Vaccination Coverage Offers Hope for Future Seasons
One of the most encouraging aspects of this year’s influenza season has been the increased vaccination coverage. As of December 31, 2025, Santé Publique France estimated that 46.3% of individuals targeted for vaccination had received the flu shot, a significant increase compared to 42.5% during the same period last season. This represents a substantial improvement in public health preparedness. Specifically, vaccination rates among individuals aged 65 and older rose to 53.3%, up from 49.8% the previous year, and 27.1% among those under 65 at risk, compared to 22.7%. Pharmacies played a crucial role in administering these vaccines, dispensing over 12 million doses.
While overall vaccination coverage is improving, there’s still room for growth, particularly among seniors receiving enhanced vaccines. According to Santé Publique France, less than one-third (29.0%) of individuals aged 65 and older received an enhanced vaccine – Efluelda or Fluad – which is preferentially recommended for this population. These enhanced vaccines are designed to provide a stronger immune response in older adults, who are more vulnerable to severe complications from influenza.
The Role of Enhanced Vaccines in Protecting Vulnerable Populations
Enhanced influenza vaccines, such as Efluelda and Fluad, contain a higher dose of antigen – the substance that triggers an immune response – compared to standard-dose vaccines. This increased antigen content is designed to elicit a stronger and more durable immune response, particularly in older adults whose immune systems may be less responsive to standard vaccines. The recommendation to prioritize these vaccines for seniors reflects a growing understanding of the unique immunological challenges faced by this population.
Looking Ahead: Continued Vigilance and Preparedness
The end of the epidemic in mainland France doesn’t signal a complete cessation of influenza activity. Continued monitoring is essential, particularly in regions still experiencing outbreaks, such as the Antilles and Guyane. Public health officials emphasize the ongoing importance of preventative measures, including vaccination, hand hygiene, and respiratory etiquette, to limit the spread of the virus. The success of this year’s vaccination campaign underscores the critical role of public health initiatives in mitigating the impact of seasonal influenza.
The French health authorities are also analyzing data from this season to inform future vaccination strategies and improve preparedness for subsequent outbreaks. This includes evaluating the effectiveness of different vaccine formulations and identifying populations at highest risk of severe illness. The lessons learned from the 2025-2026 influenza season will undoubtedly shape public health policies and interventions in the years to come.
The influenza vaccine campaign officially concludes on February 28, 2026, after a one-month extension. This extension allowed for increased access to vaccination and contributed to the higher coverage rates observed this season.
Key Takeaways
- The influenza epidemic has ended in mainland France, with most regions now in the post-epidemic phase.
- The H3N2 subtype, particularly the K clade, was the dominant strain circulating this season.
- Vaccination coverage increased significantly compared to last year, reaching 46.3% of targeted individuals.
- Enhanced influenza vaccines are recommended for individuals aged 65 and older to provide a stronger immune response.
- Continued vigilance and preventative measures remain crucial to limit the spread of influenza.
The next official update on influenza activity in France will be released by Santé Publique France in their weekly epidemiological bulletin. Readers are encouraged to consult this bulletin for the latest information and guidance. You can find more information on influenza prevention and vaccination on the Santé Publique France website: https://www.santepubliquefrance.fr/. Share your thoughts and experiences with influenza prevention in the comments below.