Monitoring of influenza vaccine effectiveness among Japanese children (2017/18 - 2019/20 season)

Monitoring of influenza vaccine effectiveness among Japanese children (2017/18 - 2019/20 season) - Monitoring of influenza vaccine effectiveness among Japanese children (2017/18 - 2019/20 season)

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000030704

Enrollment

3600

Registered

2018-01-09

Start date

2018-01-09

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

Influenza

Interventions

None listed

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1) Children with influenza-like illness (ILI) who visited collaborating pediatric clinics in Osaka/Fukuoka prefecture, Japan, during the 2017/18, 2018/19 and 2019/20 influenza season 2) Aged less than 6 years at the time of visit 3) Those who visited the clinics between 6 hours and 7 days after onset of fever (38.0 degree)

Exclusion criteria

Exclusion criteria: Subjects are excluded if they: - are aged less than 6 months, as of the last September 1st before each season - have a history of anaphylaxis after influenza vaccination - had influenza antivirals administered for the current ILI - experienced the current ILI during the hospitalization - are institutionalized - are non-residents in Osaka/Fukuoka prefecture, Japan

Design outcomes

Primary

Measure	Time frame
Laboratory-confirmed influenza	—

Countries

Japan

Contacts

Public ContactWakaba Fukushima

Osaka City University Graduate School of Medicine Department of Public Health

wakaba@med.osaka-cu.ac.jp06-6645-3756

Outcome results