Vaccinated but infected? new study investigates why
NCT ID NCT05060939
First seen Jun 24, 2026 · Last updated Jun 26, 2026 · Updated 1 time
Summary
This completed study enrolled over 1,000 vaccinated adults who later tested positive for COVID-19. Researchers analyzed the virus's genetic code and measured antibody levels to understand which variants cause breakthrough infections and how well the immune system responds. The goal is to improve vaccines and public health strategies.
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 identify which virus variants are more likely to infect vaccinated people and guide future vaccine updates.
What could go wrong
This is an observational study, not a treatment trial. It cannot prove cause and effect, and results may not apply to all populations or newer variants.
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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Locations
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BAL Antonin
Lyon, National Reference Center For Respiratory Viruses, 69317 LYON Cedex 04, France