Hidden flu carriers: study tracks Symptom-Free infections in hospital staff
NCT ID NCT02868658
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tracked 289 healthcare workers in short-stay hospital wards to see how often they caught the flu, both with and without symptoms. Participants gave blood samples and nasal swabs to confirm infections. The goal is to understand how many silent flu cases occur among staff, which could help boost vaccination rates and protect vulnerable patients.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
What this could lead to
If successful, this could provide strong evidence to encourage more healthcare workers to get flu vaccines, reducing hospital outbreaks.
What could go wrong
This is an observational study, not a treatment trial. It only measures infection rates and cannot prove that vaccination alone prevents spread.
Disclaimer
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This is a summary of
the original study
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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Edouard Herriot Hospital; Department of Epidemiology, Hygiene and Public Health
Lyon, 69437, France