Burden, Risk Factors, and Clinical Outcomes of Pediatric Influenza in a Population with Extremely Low Vaccine

Kubra Aykac1, Hacer Yakin1, Eylul Dogan Ickin2

  • 1Department of Pediatric Infectious Diseases, Hacettepe University Faculty of Medicine, Ankara, Türkiye.

Insights

Influenza causes severe illness in children, with underlying conditions increasing the need for respiratory support and risk of death. Influenza vaccination is crucial for high-risk pediatric populations.

Area of Science:

  • Pediatric Infectious Diseases
  • Respiratory Medicine
  • Epidemiology

Background:

  • Influenza is a significant cause of severe respiratory illness in children, particularly those with pre-existing health conditions.
  • Identifying risk factors for severe outcomes in pediatric influenza is crucial for targeted interventions.

Purpose of the Study:

  • To determine clinical characteristics and risk factors for respiratory support and mortality in hospitalized children with influenza.
  • To evaluate the impact of underlying diseases and coinfections on influenza outcomes in pediatric patients.

Main Methods:

  • A retrospective, multicenter study analyzed data from 1032 pediatric inpatients (<18 years) diagnosed with influenza between October 2023 and May 2024 across 33 hospitals in Türkiye.
  • Comparison of clinical features and outcomes between children requiring respiratory support and those who did not.

Main Results:

  • 38.2% of hospitalized children required respiratory support, with younger age and higher frequency of underlying diseases (neurometabolic, pulmonary) being significant factors.
  • Influenza A, viral coinfections (e.g., RSV), and underlying conditions increased the need for mechanical ventilation and mortality.
  • Overall mortality was 1.3%, with very low influenza vaccine coverage (1.1%) in the study population.

Conclusions:

  • Pediatric influenza poses a substantial risk, necessitating enhanced preventive strategies.
  • Incorporating influenza vaccination into national immunization programs is vital for protecting high-risk children.
Abstract

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