Post‑COVID‑19 syndrome in children (Review)

Filippos Filippatos1, Elizabeth-Barbara Tatsi2, Athanasios Michos1

  • 1First Department of Pediatrics, Infectious Diseases and Chemotherapy Research Laboratory, Medical School, National and Kapodistrian University of Athens, 'Aghia Sophia' Children's Hospital, 11527 Athens, Greece.

Insights

Post-COVID syndrome (PCS) in children remains unclear, with varying symptom prevalence. Further research is needed to understand risk factors and immune system roles in pediatric long COVID.

Area of Science:

  • Pediatric infectious diseases
  • Immunology
  • Public health

Background:

  • Post-COVID syndrome (PCS) describes persistent symptoms after SARS-CoV-2 infection.
  • Long-term clinical outcomes in children post-SARS-CoV-2 infection require further investigation.
  • Evidence suggests a lower prevalence of PCS in children compared to adults, but study heterogeneity complicates incidence estimation.

Purpose of the Study:

  • To review and describe long-term symptoms of PCS in children across biological systems.
  • To identify potential risk factors associated with PCS in pediatric populations.
  • To explore the role of the immune system in the development and course of PCS in children.

Main Methods:

  • Systematic literature review of studies on post-COVID syndrome in children.
  • Analysis of reported long-term symptoms categorized by biological system.
  • Examination of proposed pathophysiological mechanisms and risk factors.

Main Results:

  • Heterogeneity in current studies makes precise PCS incidence in children difficult to ascertain.
  • Risk factors and recovery patterns differ between adult and pediatric PCS.
  • Potential mechanisms include age-dependent immune responses, ACE2 expression, and social factors.

Conclusions:

  • The exact incidence and clinical spectrum of PCS in children are not well-defined.
  • Age-specific immune responses and other factors may influence PCS development in children.
  • Longitudinal studies are essential to clarify the pathophysiology and long-term outcomes of PCS in pediatric populations.

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