Third MMR dose may revive waning immunity in adults
NCT ID NCT05923970
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at whether a third dose of the MMR vaccine can improve immunity in adults whose antibody levels have dropped below protective levels. Researchers will measure immune responses in 200 women who already received a third dose through routine care. The goal is to understand if an extra shot helps maintain protection against measles, mumps, rubella, and varicella.
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 show that a third MMR dose helps restore protection in adults whose immunity has faded over time.
- What could go wrong
- This is a small observational study (200 participants) that does not give the vaccine itself. Results may not apply to everyone, and it only measures immune markers, not actual infection prevention.
This is an AI summary of the original study and may miss details. Read our disclaimer.
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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University of Alberta
RECRUITINGEdmonton, Alberta, T6G2R3, Canada
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