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Ongoing, recruitingTherapeutic use (Phase IV)Interventional

Impact of influenza vaccination on nasal resident memory immune responses and respiratory peripheral memory immune responses - MUCOVAC 2

The MUCOVAC 2 study is investigating how the standard flu vaccine works inside our bodies to protect us from the flu. Researchers are particularly interested in two things: how the vaccine influences special immune cells in the lining of the nose, and how it affects other immune cells in the blood that are programmed to travel to the lungs and airways. By looking at these cells before and after vaccination, the study hopes to gain a clearer picture of how our body's defense system responds to the vaccine and prepares to fight off the flu virus. This understanding could help scientists develop even better flu vaccines in the future. This is a Phase IV study, meaning it's looking at the vaccine's effects in real-world use.

At a glance

Status
Ongoing, recruiting
Phase
Therapeutic use (Phase IV)
Sponsor
Centre Hospitalier Universitaire De Saint Etienne
Enrolment target
30
Start
02 Dec 2025

What is this study about?

This study, called MUCOVAC 2, is a research project designed to help us understand more about how flu vaccines work. When you get a flu shot, your body's immune system swings into action, learning to recognize and fight off the flu virus. This study focuses on a very specific part of this process: how certain immune cells in your body react to the vaccine. Think of these cells as tiny soldiers that remember past infections and are ready to jump into action if they see the same threat again.

The researchers are particularly interested in immune cells found in two main places: inside your nose and circulating in your blood. The nose is often where flu viruses first enter the body, so having strong immune defenses there is really important. The study will look at how the flu vaccine changes these immune cells in both locations. They want to see how many of these ‘memory’ cells are present before and after vaccination, and also how many of the blood cells are programmed to go to your breathing passages, like your nose and lungs.

By carefully studying these changes, the scientists hope to get a better idea of how the flu vaccine helps your body build up a good defense against the flu. This information is valuable because it can help them learn what makes a flu vaccine most effective and potentially lead to new ways of making vaccines even better at protecting us from seasonal flu.

Key takeaways

  • The study explores how flu vaccines activate immune cells in your nose and blood.
  • It uses standard, approved flu vaccines (e.g., Flucelvax, VAXIGRIPTETRA, INFLUVAC TETRA).
  • Participation involves providing nose and blood samples before and after vaccination.
  • The goal is to improve our understanding of flu protection for future vaccine development.
  • You must be an adult aged 18 or older and planning to get your seasonal flu shot.
  • Participation is voluntary, and you can withdraw at any time.

Who may be eligible?

This study is looking for adult volunteers to take part. To be eligible, you need to be at least 18 years old. There's no upper age limit, meaning older adults can also participate.

Both men and women are welcome to join this study. The main requirement is that you are seeking to get your seasonal flu vaccination at the time of the study.

Apart from being an adult looking for a flu vaccine, additional health checks will be done by the study team to make sure it's safe for you to take part and that you fit all the study's specific criteria. These checks help ensure the study results are as clear and useful as possible.

Quick self-check
  • Are you 18 years old or older?
  • Are you planning to get your seasonal flu vaccine?
  • Do you understand that you will need to provide nose and blood samples?
  • Are you comfortable with the possibility of minor side effects from the flu vaccine itself?

This is a guide only — the research team will confirm whether you can take part.

What does participation involve?

If you decide to take part in this study, you would first have a screening visit to check if you are eligible. If you are, you would receive a standard flu vaccine, either Flucelvax, VAXIGRIPTETRA, or INFLUVAC TETRA, as part of your regular seasonal immunisation. The study involves looking at samples collected before and after you receive your flu shot. This will include collecting samples from inside your nose and blood samples. The researchers will be looking at specific immune cells in these samples. The total duration of your participation would involve these visits for sample collection around the time of your vaccination.

Potential risks and benefits

A potential benefit of joining this study is that you would receive your seasonal flu vaccination, which helps protect you from the flu. Your participation also helps scientists better understand how flu vaccines work, which could lead to improved vaccines in the future. As with any vaccine, there's a small chance of side effects, such as soreness, redness, or swelling where you got the injection, or mild flu-like symptoms. The study team will explain all potential risks in detail. Remember, taking part in any study is entirely voluntary, and you are free to withdraw at any time without giving a reason, and it will not affect your usual medical care.

Locations (1)

  • France

Common questions

What is the main goal of this study?

The study aims to understand how flu vaccines affect immune cells in your nose and blood, to learn more about how they protect you from the flu.

What kind of vaccine will I receive?

You'll receive a standard seasonal flu vaccine, like Flucelvax, VAXIGRIPTETRA, or INFLUVAC TETRA, which are commonly used in the UK.

Will I have to do anything special?

You'll have some samples taken, such as from inside your nose and blood, both before and after your flu vaccination.

Is this a new or experimental vaccine?

No, this study uses standard, approved flu vaccines that are already in use. It's looking at how these existing vaccines work.

Who can join the study?

Adults aged 18 and over who are planning to get their seasonal flu vaccination are generally eligible.

How to find out more

Always speak to your GP or specialist before deciding to take part in a study.

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