Effectiveness of Influenza Vaccination among Students in Shenzhen: A Case-Control Study with test-negative design

Status

Active, not recruiting

Phases

Phase 4

Study type

Observational

Source

ChiCTR

Registry ID

ChiCTR2300072493

Enrollment

Unknown

Registered

2023-06-15

Start date

2023-09-01

Completion date

Unknown

Last updated

2023-06-18

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

Conditions

influenza

Interventions

Group of influenza:Observational study, No intervention

Eligibility

Sex/Gender

All

Age

6 Years to 18 Years

Inclusion criteria

Inclusion criteria: 1) Patients aged 6-18 years with ILl 2) Primary and secondary school students in Shenzhen

Exclusion criteria

Exclusion criteria: 1) Failure to establish effective communication as judged by the responsible clinical professional 2) contraindications to influenza vaccine 3) patients from other cities to Shenzhen 4) patients who had taken any anti-influenza virus medication (Tamiflu, Covet, Orfi) within 7 days before symptom onset.

Design outcomes

Primary

Measure	Time frame
Polymerase Chain Reaction;	—

Countries

China

Contacts

Public ContactYuelong Shu

School of Public Health (Shenzhen), Sun Yat-sen University

shuylong@mail.sysu.edu.cn+86 139 1018 6546

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 4, 2026