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RecruitingRSV Infection

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

Eligible age

0+ yrs

Accepts

All genders

Locations

20 states

Healthy volunteers

Yes

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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.

Sponsor: Pfizer

Where it's recruiting

Alabama

Birmingham · Mobile

California

Los Angeles · Palo Alto

Colorado

Aurora

Florida

North Miami Beach · Panama City

Idaho

Boise · Idaho Falls · Nampa

Iowa

Ames

Kansas

Kansas City

Louisiana

Lafayette · New Orleans

Mississippi

Gulfport

Montana

Great Falls · Kalispell · Missoula

Nebraska

Grand Island · Norfolk

Source: ClinicalTrials.gov · NCT06866405 · last updated 2026-06-16