COVID vaccine booster in pregnancy: does it protect baby too?
NCT ID NCT05543993
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This completed study followed 150 pregnant or breastfeeding women who received a bivalent COVID-19 booster. Researchers measured antibody levels in mothers, infants, and breast milk to understand how vaccination impacts immunity against COVID-19 variants. The goal was to learn more about protection for both mother and child.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- Active substance
- Bivalent COVID-19 Booster (Pfizer or Moderna)
- What this could lead to
- If successful, this study could help clarify how well COVID-19 vaccines protect both mothers and their babies.
- What could go wrong
- This is an observational study, not a treatment trial. Results may not apply to all populations or newer virus variants.
This is an AI summary of the original study and may miss details. Read our disclaimer.
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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
-
Thomas Jefferson University Hospital
Philadelphia, Pennsylvania, 19107, United States
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