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Soignant gante administrant un vaccin dans le bras d'un patient
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Seasonal flu: who should be vaccinated?

IRIS Prévention
14 October 2026
The flu is not a simple cold: for fragile people, it can be serious. Annual vaccination is their best protection.

Every winter, seasonal flu affects many people. Often benign, it can be serious in fragile people. Vaccination, renewed every year, is the main way to protect yourself. But who is affected, and why does it have to be repeated every year? Let's take stock.

1. The flu, a disease not to be underestimated

The flu is a contagious respiratory infection. In a healthy person, it is generally mild but distressing. In fragile people, it can cause serious complications. Every year, it is responsible for preventable hospitalizations and deaths.

2. Who is particularly concerned?

PopulationWhy
Elderly peopleIncreased risk of complications
Chronic diseasesFragility to infections
Pregnant womenSpecific recommendation
Surrounding people fragileProtect loved ones

Vaccination is particularly recommended for people at risk of severe disease. Vaccinating those around vulnerable people also helps protect them.

3. Why an annual vaccination?

Influenza viruses change from year to year. The vaccine is therefore adapted each year to the expected strains. Additionally, the protection wanes over time. This is why vaccination must be renewed each season, before the arrival of the epidemic.

4. When and where to get vaccinated?

Vaccination is ideally done in the fall, before the winter epidemic peak, to be protected in time. It can be carried out by the doctor, nurse or pharmacist. People at risk often receive an invitation.

    • Get vaccinated in the fall, before the epidemic
    • Renew each year
    • Think about protecting those around vulnerable people

For those concerned, annual vaccination is a simple and effective gesture. The doctor or pharmacist can advise.

💡 tips to remember

    • The flu is generally mild but can be serious in fragile people, with sometimes serious complications.
    • Vaccination is particularly recommended for people at risk: advanced age, chronic illnesses, pregnant women.
    • Vaccinating those around vulnerable people also helps to protect them.
    • Vaccination is annual because viruses evolve and protection weakens: the vaccine is adapted each year.
    • I get vaccinated in the fall, before the peak epidemic; doctor, nurse or pharmacist can do it.