Could a pill stop the stomach bug? new vaccine trial shows promise
NCT ID NCT05212168
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tested an experimental oral vaccine designed to protect against norovirus, a highly contagious virus that causes vomiting and diarrhea. Healthy adults aged 18 to 49 received either a single dose of the vaccine or a placebo. About a month later, all volunteers were intentionally exposed to the norovirus in a controlled setting to see if the vaccine could prevent illness. The trial measured how many people got sick and looked at immune responses in the blood.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
oral norovirus vaccine (VXA-G1.1-NN) with a double-stranded RNA adjuvant
What this could lead to
If successful, this could lead to a convenient single-dose oral vaccine that protects against norovirus, the leading cause of stomach flu outbreaks.
What could go wrong
This is an early-phase trial with only 165 participants, and it tested protection against one specific strain. The vaccine may not work as well in real-world settings or against other norovirus strains.
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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AltaSciences LA
Cypress, California, 90630, United States
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