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Antibody Persistence at 2 and 3 Years after Immunization with a Recombinant Pertussis Booster Dose in Adults and Elderly

Antibody persistence at 2 and 3 years after a single dose vaccination of an investigational combined Tetanus-diphtheria-recombinant acellular pertussis vaccine (BioNet Tdap) and licensed recombinant TdaP vaccine (Boostagen), investigational recombinant monovalent acellular pertussis vaccine (BioNet ap) and licensed recombinant aP vaccine (Pertagen), and another licensed Tdap vaccine

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
TCTR
Registry ID
TCTR20250525008
Enrollment
359
Registered
2025-05-25
Start date
2022-03-02
Completion date
Unknown
Last updated
2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Pertussis vaccine Pertussis vaccine

Interventions

Participants who received BioNet aP vaccine in the initial TDA206 study,Participants who received BioNet TdaP vaccine in the initial TDA206 study,Participants who received License aP vaccine in the in
Prevention,Prevention,Prevention,Prevention,Prevention
BioNet aP vaccine group,BioNet TdaP vaccine group,License aP vaccine group,License TdaP vaccine group,License Tdap group

Sponsors

Chulalongkorn University
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 64 Years

Inclusion criteria

Inclusion criteria: At 2-year Follow-up Visit A participant will be eligible for inclusion if ALL of the followings apply at the time of screening: 1. Having participated in the initial TDA206 study and received a single dose of one of the 5 study vaccines. This participant should have also been a part of the randomly pre-selected participants who were subject to immunogenicity assay at Visit 4 and completed the study; 2. Written informed consent for 2-year follow-up visit is obtained prior to study entry; 3. Capable of complying with study procedures and willing to provide with a blood sample. At 3-year Follow-up Visit A participant will be eligible for inclusion if ALL of the followings apply at the time of screening: 1. Having participated in the initial TDA206 study and received a single dose of one of the 5 study vaccines. This participant should have also been a part of the randomly pre-selected participants who were subject to immunogenicity assay at Visit 4 and completed the study; 2. Written informed consent for 3-year follow-up visit is obtained prior to study entry; 3. Capable of complying with study procedures and willing to provide with a blood sample.

Exclusion criteria

Exclusion criteria: At 2-year Follow-up Visit A participant with following criteria at screening will not be eligible for participation: 1. Having received pertussis vaccine since the completion of Visit 4 in TDA206 study 2. Anything in the opinion of the investigator that would prevent the healthy volunteer from participating in the study or would put the participant at risk At 3-year Follow-up Visit A participant with following criteria at screening will not be eligible for participation: 1. Having received pertussis vaccine since the completion of Visit 4 in TDA206 study 2. Anything in the opinion of the investigator that would prevent the healthy volunteer from participating in the study or would put the participant at risk

Design outcomes

Primary

MeasureTime frame
Seroconversion rates of anti-PT and anti-FHA antibodies in BioNet Recombinant ap, BioNet Recombinant Tdap and Licensed Tdap 2 and 3 years after vaccination ELISA

Secondary

MeasureTime frame
Seroconversion rates of anti-PT and anti-FHA antibodies in License aP and License TdaP vaccine groups 2 and 3 years after vaccination ELISA,Seroconversion rates of PT antibody in License aP and License TdaP vaccine groups 2 and 3 years after vaccination PT neutralizing in CHO cell assay,GMC of anti-PT, anti-FHA, anti-tetanus and anti-diphtheria antibodies in each study group 2 and 3 years after vaccination ELISA,Seroprotection rates of anti-tetanus and anti-diphtheria antibodies in BioNet Recombinant Tdap, Licensed TdaP and Licensed Tdap 2 and 3 years after vaccination ELISA ,GMTof PT antibody in each study group 2 and 3 years after vaccination PT neutralizing in CHO cell assay

Countries

Thailand

Contacts

Public ContactSouad Mansouri

BioNet-Asia Co.,Ltd.

souad.m@bionet-asia.com023618110

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 10, 2026