Global study tracks how COVID-19 variants outsmart vaccines
NCT ID NCT05534009
First seen Jun 25, 2026 · Last updated Jun 26, 2026 · Updated 2 times
Summary
This study follows 1800 healthcare workers from eight countries for up to 24 months to see how their immune systems respond to COVID-19 vaccines and infections. Researchers will collect blood samples and health data to understand how different viral variants affect immunity. The goal is to improve future vaccine strategies, not to test a new treatment.
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 study could help scientists understand how well vaccines and past infections protect against new COVID-19 variants.
What could go wrong
This is an observational study, not a treatment trial, so it won't directly lead to a new therapy. Results may take time and might not apply to all populations.
Disclaimer
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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.
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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Study contacts
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Contact
Phone: •••-•••-•••• Email: •••••@•••••
Locations
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Azienda Socio-Sanitaria Territoriale Santi Paolo e Carlo
RECRUITINGMilan, Italy
Contact Phone: •••-•••-•••• Email: •••••@•••••
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Bach Mai Hospital
RECRUITINGHanoi, Vietnam
Contact Email: •••••@•••••
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Centro Hospitalar de Lisboa Ocidental
RECRUITINGLisbon, Portugal
Contact Phone: •••-•••-•••• Email: •••••@•••••
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Heinrich Heine university
RECRUITINGDüsseldorf, Germany
Contact Email: •••••@•••••
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Hospital Juan Ghaham Casasus
RECRUITINGVillahermosa, Mexico
Contact Phone: •••-•••-•••• Email: •••••@•••••
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Ieo Istituto Europeo Di Oncologia
RECRUITINGMilan, Italy
Contact Email: •••••@•••••
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Viesoji Istaiga Vilniaus Uiversiteto Ligoninė Santaros klinikos
RECRUITINGVilnius, Lithuania
Contact Email: •••••@•••••