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Study identifier: NCT06866405 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

A Phase 3 Study of Revaccination in Subsequent Pregnancies With Bivalent RSV Vaccine and Duration of Protection of a Single Dose

Condition: RSV Infection  ·  Sponsor: Pfizer

PhasePhase 3
Planned participants550
Who can joinAll sexes, 0 Years to no upper limit
Healthy volunteersYes

About this study

This study aims to check how safe and well-tolerated a second dose of RSVpreF is when given during later pregnancies, and to see how long the immunity lasts from a single dose given during a previous pregnancy by examining the blood of nonpregnant participants who had the vaccine before.

This description comes directly from the study's public registry record.

Talk to the study team

Pfizer CT.gov Call Center  ·  1-800-718-1021  ·  ClinicalTrials.gov_Inquiries@pfizer.com

Always discuss trial participation with your own doctor first.

Locations (97)

Center for Research in Women's HealthBirmingham, Alabama, United StatesRecruiting
Children's of AlabamaBirmingham, Alabama, United StatesRecruiting
University of Alabama at Birmingham - School of MedicineBirmingham, Alabama, United StatesRecruiting
University of Alabama at Birmingham Women & Infants CenterBirmingham, Alabama, United StatesRecruiting
USA Health Children's and Women's HospitalMobile, Alabama, United StatesRecruiting
USA Health Strada Patient Care CenterMobile, Alabama, United StatesRecruiting
Ronald Reagan UCLA Medical CenterLos Angeles, California, United StatesRecruiting
Ronald Reagan UCLA Medical Center (inpatient hospital)Los Angeles, California, United StatesRecruiting
Ronald Reagan UCLA Medical CenterLos Angeles, California, United StatesRecruiting
UCLA (outpatient clinic)Los Angeles, California, United StatesRecruiting
UCLA Clinical and Translational Research Center (research clinic)Los Angeles, California, United StatesRecruiting
UCLALos Angeles, California, United StatesRecruiting

+ 85 more locations — full list on the registry record.

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Source record: clinicaltrials.gov/study/NCT06866405