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Study identifier: NCT07097012 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

Concurrent Versus Sequential Administration of Tdap and RSV Vaccines in Pregnancy

Condition: RSV · Tdap - Tetanus, Diphtheria and Acellular Pertussis Vaccination · Pregnancy  ·  Sponsor: Canadian Immunization Research Network

PhasePhase 4
Planned participants60
Who can joinFemale, 18 Years to 49 Years
Healthy volunteersNo

About this study

The goal of this clinical trial is to learn if the RSV vaccine (protects against respiratory syncytial virus) and Tdap vaccine (protects against pertussis) are most effective in pregnant individuals when taken together at the same visit, or separately at different visits. This clinical trial will also learn about the safety and immune responses of these vaccines in pregnancy. The Main question: -Is it possible to run a successful trial that tests how safe and effective it is to give Tdap and RSV vaccines in pregnancy either at the same time or one after the other, at different visits? The Secondary question: -To determine how safe and how well the Tdap and RSV vaccines work when given in pregnancy either at the same time or one after the other, at different visits. The Exploratory (optional participation) questions: * To measure the levels of antibodies against whooping cough (pertussis) and RSV in mothers at 7 and 19 months after giving birth, depending on whether they got the vaccines at the same time or one after the other during pregnancy. * To measure whooping cough antibody levels in the babies at 2, 7, and 19 months of age, whose mothers who received the vaccines in pregnancy. * To measure the levels of RSV antibodies in the mothers' breast milk at 1 week, 2 weeks, 4 weeks, and 2 months after giving birth. Participants will be randomly assigned to Group 1 (vaccines given at the same time, same visit) or Group 2 (vaccines given one after the other, at different v…

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

Talk to the study team

Bahaa Abu-Raya, M.D, PhD  ·  (902) 470-8142  ·  bh723616@dal.ca

CTN CIRN Central Inbox  ·  CTN.CIRN@iwk.nshealth.ca

Always discuss trial participation with your own doctor first.

Locations (4)

Vaccine Evaluation CenterVancouver, British Columbia, CanadaActive Not Recruiting
Canadian Center for VaccinologyHalifax, Nova Scotia, CanadaRecruiting
The Ottawa Hospital Research InstituteOttawa, Ontario, CanadaRecruiting
Centre hospitalier universitaire Ste-JustineMontreal, Quebec, CanadaRecruiting

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Source record: clinicaltrials.gov/study/NCT07097012