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Immune Persistence and Safety Survey regarding Initial and Booster Vaccination of Monovalent Vaccine for SARS-CoV-2 Omicron Strain XBB.1.5 (Cohort Study) in Japan

Immune Persistence and Safety Survey regarding Initial and Booster Vaccination of Monovalent Vaccine for SARS-CoV-2 Omicron Strain XBB.1.5 (Cohort Study) in Japan - Immune Persistence and Safety Cohort Survey on SARS-CoV-2 XBB Strain Initial and Booster Vaccination in Japan

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
JPRN
Registry ID
JPRN-UMIN000052238
Enrollment
6500
Registered
2023-09-20
Start date
2023-09-20
Completion date
Unknown
Last updated
2026-06-29

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

Conditions

COVID-19

Interventions

None listed

Sponsors

Juntendo University
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: Initial Vaccination Recipient: 1) Individuals aged 12 years or older who have never received a COVID-19 vaccine and are receiving their first dose of the monovalent Omicron strain XBB.1.5 vaccine, regardless of their infection history. 2)Individuals who require blood sampling for antibody titer determination should, in principle, be able to visit the relevant medical institution for a minimum 6-month survey period. For those participating solely in the survey, the survey form can be submitted by mail. 3)Vaccinated individuals with written consent: For those aged 12 to 15: Individuals who have received an explanation of the research and have provided informed assent with written informed consent from a parent or guardian. For those aged 16 to 17: Individuals who have received an explanation of the research and have provided informed consent, along with written informed consent from a parent or guardian. For those 18 years of age or older: Individuals who have provided written informed consent for participation in the research study. Booster Vaccination Recipient: 1)Individuals aged 12 years or older who have completed their initial SARS-CoV-2 vaccination and have received an additional dose of the monovalent Omicron strain XBB.1.5 vaccine after the specified vaccination interval since their previous vaccination. 2)Individuals who require blood sampling for antibody titer determination should, in principle, be able to visit the relevant medical institution for a minimum 6-month survey period. For those participating solely in the survey, the survey form can be submitted by mail. 3)Vaccinated individuals with written consent: The same as initial vaccination recipient.

Exclusion criteria

Exclusion criteria: Those who are inappropriate as the subject of the survey determined by the principal investigator

Design outcomes

Primary

MeasureTime frame
Safety up to 4 weeks after initial or booster recipients of SARS-CoV-2 vaccine for XBB strain

Secondary

MeasureTime frame
Breakthrough infection rate up to 12 months after the last SARS-CoV-2 vaccination Serious adverse events up to 12 months after vaccination (regardless of causality) Changes in COVID-19 antibody titer up to 12 months after vaccination (some of the survey subjects)

Countries

Japan

Contacts

Public ContactMorikuni Tobita

SARS-CoV-2 vaccine Research Secretariat, Juntendo University Clinical Research and Trial Center, Juntendo University Hospital

covidvac@juntendo.ac.jp03-3813-3111

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026