Study Evaluating the Safety of a Recombinant Acellular Pertussis Vaccine in Pregnant Women

An Observational Study to Assess the Safety of Pertagen®, a Recombinant Acellular Pertussis Vaccine in Pregnant Women in Thailand

This is an observational, retrospective, cohort, safety study in pregnant women (vaccinated with Pertagen®) and have given birth in Thailand from January 2021 to April 2024 and infants born to pregnant women who received Pertagen®.

Following approval of the final protocol from the Institutional Review Board (IRB) and/or Ethics Committee (EC) and written approval from hospital directors/medical doctors as per requirements of each institutions. The assigned Ob-gyn specialist/physician at each study site will review the medical record of pregnant women (January 2020 to April 2024) based on study selection criteria. Safety information of pregnant women who received Pertagen® and have given birth from January 2021 to April 2024 and infants born to pregnant women who received Pertagen® will be obtained from medical records in hospitals/clinics and will be reported in case report form (CRF) by assigned Ob-gyn specialist/physician at each study site. The assigned Ob-gyn specialist/physician at each study site who will review the medical records and report the data in case report form (CRF) is not part of the research team.

Study Overview

• Status: Active, not recruiting
• Conditions: Pertussis (Whooping Cough); Pertussis Vaccines

Detailed Description

A CRF has been developed and will be used to collect safety information on pregnancy outcomes including the health status of infants at birth. The following definitions will be used for data collection

• The 2nd trimester of pregnancy is defined as gestational period between 13-26 weeks
• The 3rd trimester of pregnancy is defined as gestational period from 27 weeks to delivery.
• Full term birth is defined as delivery of a baby at gestational age (GA) ≥37 weeks.
• Preterm birth is defined as delivery of a baby at GA<37 weeks.
• Complications during delivery may include postpartum hemorrhage, maternal fever or infection, or any maternal and fetal indications that may require emergency caesarean section.
• Safety information of pregnancy and delivery outcome refers to health of women during pregnancy and childbirth (WHO 2024). The most common direct causes of maternal injury and death are excessive blood loss, infection, high blood pressure, unsafe abortion, and obstructed labor, as well as indirect causes such as anemia and heart disease (WHO 2024).
• A newborn is defined as healthy at birth if discharged from the hospital in the first few days of life.
• A newborn is defined as not healthy if with difficulty of breathing, congenital abnormality or other conditions that would require prolonged stay at the hospital.

To ensure the privacy and confidentiality of the collected data, strict adherence to all relevant data protection regulations will be followed.

• Study Type: Observational
• Enrollment (Estimated): 2700

Contacts and Locations

Study Locations

• Thailand
  • Bangkok
    • Bangkok, Bangkok, Thailand, 10700
      • Faculty of medicine Siriraj Hospital Mahidol University

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Child; Adult; Older Adult
• Accepts Healthy Volunteers: Yes

• Sampling Method: Non-Probability Sample

Study Population

The pregnant women who received Pertagen® and have given birth from January 2021 to April 2024 and infants born to pregnant women who received Pertagen® which obtained from medical records in hospitals/clinics

Description

Inclusion Criteria:

1. Data of pregnant women previously vaccinated with Pertagen® during second or third trimester of pregnancy and have given birth in Thailand from January 2021 to April 2024 and infants born to pregnant women who received Pertagen® during pregnancy.
2. Infant of pregnant women who received Pertagen® during second or third trimester of pregnancy

Exclusion Criteria:

1. pregnant women previously vaccinated with Pertagen®, but maternal and infant data at delivery/birth cannot be obtained.

Study Plan

How is the study designed?

Number of groups / cohorts

1

Cohorts and Interventions

Group / Cohort
Pregnant women received Pertagen® and have given birth in Jan 2021-Apr 2024 and their infants; The pregnant women (previously vaccinated with Pertagen®) and have given birth in Thailand from Jan 2021 - Apr 2024 and infants born to pregnant women who received Pertagen®.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
1 Number and percentage of pregnant women vaccinated with Pertagen who had experienced full term and preterm (or premature) delivery 1.2 Number and percentage of pregnant women vaccinated with Pertagen® who had experienced complications during delivery.	Full term birth is defined as delivery of a baby at gestational age (GA) ≥37 weeks.; Preterm birth is defined as delivery of a baby at GA<37 weeks.; Complications during delivery may include postpartum hemorrhage, maternal fever or infection, or any maternal and fetal indications that may require emergency caesarean section.	Safety profile of Pertagen® in pregnant women at delivery

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
1 Number and percentage of healthy infants born to mothers who received Pertagen® during pregnancy. 2.2 Number and percentage of not healthy infants born to mothers who received Pertagen® during pregnancy	A newborn is defined as healthy at birth if discharged from the hospital in the first few days of life.; A newborn is defined as not healthy if with difficulty of breathing, congenital abnormality or other conditions that would require prolonged stay at the hospital.	Safety profile of Pertagen® in infants born to mother who received Pertagen® at birth

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number and percentage of pregnant women had experienced preterm (or premature) delivery in pregnant women received Pertagen® and gave birth during January 2021 - April 2024 and in pregnant women received licensed Td vaccine and gave during 2019-2020	Preterm birth is defined as delivery of a baby at GA<37 weeks.	1. Data from review medical records of pregnant women who received Pertagen® and have given birth in Jan 2021 - Apr2024 with their infants. 2. - Data of pregnant women received Td vaccine and gave birth in 2019-2020 (source: HDC, MopH Thailand)

Collaborators and Investigators

• Sponsor: BioNet-Asia Co., Ltd.
• Investigators: Study Director: Soaud Mansouri, PhD., Bionet-Asia Co., Ltd (Branch1)

Study record dates

Study Major Dates

• Study Start (Actual): December 12, 2024
• Primary Completion (Actual): April 11, 2025
• Study Completion (Estimated): October 31, 2025

Study Registration Dates

• First Submitted: March 12, 2025
• First Submitted That Met QC Criteria: March 19, 2025
• First Posted (Actual): March 21, 2025

Study Record Updates

• Last Update Posted (Estimated): October 3, 2025
• Last Update Submitted That Met QC Criteria: October 2, 2025
• Last Verified: September 1, 2025

More Information

Terms related to this study

• Keywords: Pertussis; whooping cough
• Additional Relevant MeSH Terms: Respiratory Tract Infections; Infections; Respiratory Tract Diseases; Bacterial Infections; Bacterial Infections and Mycoses; Gram-Negative Bacterial Infections; Bordetella Infections; Whooping Cough
• Other Study ID Numbers: PerMIS-01

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No