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

Study Summary

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.

Conditions

RSV Infection

Interventions / Drugs

RSVpreF Placebo

View on ClinicalTrials.gov ↗

Sponsor

Study Details

Enrollment550 participants

Primary Completion—

Lead SponsorPfizer

Data Retrieved2026-04-11 02:55:53.190785+00:00

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