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Flu

The flu is a contagious viral respiratory infection that causes seasonal outbreaks every winter. The flu vaccine is the most effective way to protect yourself.

Our missions

  • Monitor the epidemiological status of influenza and assess its impact on public health

  • Promote vaccination and preventive measures against influenza

  • Informing healthcare professionals and the general public

vaccination-info-service.fr - Le site de référence qui répond à vos questions

The disease

The flu, a seasonal epidemic

In mainland France, the epidemic occurs every year, generally between November and April, usually beginning in late December or early January. It lasts an average of 10 to 11 weeks.

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Pandemic influenza

An influenza pandemic is an epidemic that spreads across a very large geographical area following the emergence of a new influenza virus, usually resulting from a major genetic change.

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What We Do

Flu prevention measures

Santé publique France is implementing flu prevention measures through various resources designed for the general public and healthcare professionals.

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Epidemiological surveillance of influenza

Santé publique France coordinates influenza surveillance, which begins in October (week 40) and ends in mid-April of the following year (week 15) in mainland France.

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Data

The influenza surveillance system established by Santé publique France makes it possible to study the epidemiological trends of this viral disease on an annual basis.

Epidemiological Situation of Influenza in France

For the 2025–2026 season, the agency is implementing an “integrated”...

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Tools

Here you will find the resources (videos, TV spots, radio spots) and prevention materials made available to healthcare professionals and the general public

carte postale

Simplified 2025 Vaccination Schedule for Pregnant Women [postcard]

Postcard featuring the simplified 2025 vaccination schedule for pregnant women. It lists the vaccines recommended before and during pregnancy.

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Cough, fever, runny nose—let’s put on a mask

A public awareness poster for the "Barrier Measures 2025" campaign, which aims to make barrier measures a lasting habit to combat winter viruses. This poster engages the general public in a...

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Publications

Here you will find the latest scientific publications related to the studies and research conducted by Santé publique France.

2 publications

In relation to

thematic dossier

The First 1,000 Days

The period from conception through the first two years of life is critical for a child’s development and the health of the adult they will become. That is why it is essential to prioritize the...

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thematic dossier

Aging Well

People over the age of 60 could account for one-third of the population by 2050. The priority today is no longer to extend life expectancy but to improve the quality of life for older adults.

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Vaccination

Vaccination

thematic dossier

Contagious diseases most often affect children at a very young age. Because children are particularly vulnerable, they are a priority target for vaccination programs.

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