Vaccine effectiveness of COVID-19 vaccine in Japan

Vaccine effectiveness of COVID-19 vaccine in Japan - Vaccine effectiveness of COVID-19 vaccine in Japan

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000056872

Enrollment

5000

Registered

2025-02-03

Start date

2025-03-01

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

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Patients who had signs and symptoms consistent with COVID-19 and tested for SARS-CoV-2.

Exclusion criteria

Exclusion criteria: 1. Patients who refused to participate through opt-out. 2. Patients whose COVID-19 vaccination history is unknown.

Design outcomes

Primary

Measure	Time frame
Effectiveness of COVID-19 vaccine among adults aged 60 years or older in Japan.	—

Countries

Japan

Contacts

Public ContactHaruka Maeda

Institute of Tropical Medicine, Nagasaki University Department of Respiratory Infections

mharuka@nagasaki-u.ac.jp095-819-7842

Outcome results