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.
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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
Locations
-
Edouard Herriot Hospital; Department of Epidemiology, Hygiene and Public Health
Lyon, 69437, France
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Other studies related to the condition(s) this trial covers.
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