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Long term immunogenicity of BNT162b2 vaccination and attitudes toward COVID-19 booster vaccines in Thai children

Long term immunogenicity of BNT162b2 vaccination and attitudes toward COVID-19 booster vaccines in Thai children

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
TCTR
Registry ID
TCTR20220301002
Enrollment
240
Registered
2022-03-01
Start date
2022-03-19
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

immunogenecity of SARS-CoV-2 mRNA vaccine, vaccine hesitancy SARS-CoV-2, mRNA vaccine, booster vaccination, Immunogenicity, immune waning, vaccine hesitancy

Interventions

children aged 5-11 years completed second dose of BNT162b2 vaccine for 6 months at the time of data collection,adolescents aged 12-18 years completed second dose of BNT162b2 vaccine for 6 months at th
Prevention,Prevention
children aged 5-11 years,adolescents aged 12-18 years

Sponsors

Ratchadapisek Research Funds
Lead Sponsor

Eligibility

Sex/Gender
All
Age
5 Years to 18 Years

Inclusion criteria

Inclusion criteria: 1. Participants must age 5 to <18 years old on the day of first dose vaccination, 2. Participants must be completed second dose of BNT162b2 vaccine for 6 months at the time of data collection, 3.Participants must be in good health at the time of entry into the trial as determined by medical history, physical examination (including vital signs), and the clinical judgment of the investigator, 4.Participants and parent(s) must be able to communicate effectively with study personnel and considered reliable, willing, and cooperative in terms of compliance with the protocol requirements, 5.Participants and/or parent(s) or legally authorized representative(s) must sign a written informed consent form, including any required privacy authorization form, prior to the initiation of any trial procedures, after the nature of the trial has been explained according to local regulatory requirements

Exclusion criteria

Exclusion criteria: 1. Participants with previous documented SARS-CoV-2 infection, 2. Receipt of immunoglobulins or blood products between the day of first vaccination and blood collection, 3.Receipt of any other vaccines within 14 days (for inactivated vaccines except influenza vaccine) or 28 days (for lived vaccines) prior to blood collection, 4. Use of any medications that may be associated with impaired immune responsiveness or with immunosuppression.

Design outcomes

Primary

MeasureTime frame
Anti-S-RBD IgG completed second dose of BNT162b2 vaccine for 6 months at the time of data collection BIOTEC COVID-19 IgG ELISA,Surrogate virus neutralization test (sVNT) to variants of concern completed second dose of BNT162b2 vaccine for 6 months at the time of data collection ELISA

Secondary

MeasureTime frame
Vaccine hesitancy completed second dose of BNT162b2 vaccine for 6 months at the time of data collection Questionnaire

Countries

Thailand

Contacts

Public ContactPavinee Assavavongwaikit

Department of Pediatrics, Faculty of Medicine, Chulalongkorn University

patpvn.a@gmail.com6622564930

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026