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Coronavirus disease 2019 respiratory disease in children: clinical presentation and pathophysiology
Lea C Steffes1, David N Cornfield
1Division of Pulmonary, Asthma and Sleep Medicine, Department of Pediatrics, Center for Excellence in Pulmonary Biology, Stanford University Medical School, Stanford, California, USA.
Insights
Pediatric coronavirus disease 2019 (COVID-19) respiratory illness presents milder than adult cases. Research is ongoing to understand age-related differences in immune response and cell entry that protect children from severe COVID-19 outcomes.
Area of Science:
- Pediatric infectious diseases
- Immunology
- Respiratory medicine
Background:
- Coronavirus disease 2019 (COVID-19) in children exhibits a distinct, milder clinical phenotype compared to adults.
- Early observations noted decreased disease severity in pediatric COVID-19 pneumonia.
- Ongoing research focuses on viral cell entry efficiency and immune response timing differences between children and adults.
Purpose of the Study:
- To review current knowledge on the clinical patterns, cellular pathophysiology, and epidemiology of pediatric COVID-19 respiratory disease.
- To highlight maturation-related factors influencing disease severity differences between children and adults.
Main Methods:
- Literature review of pediatric COVID-19 respiratory disease.
- Analysis of clinical presentation, pathophysiology, and epidemiology.
- Focus on age-related differences in disease severity.
Main Results:
- The clinical spectrum of COVID-19 respiratory disease in children is well-defined.
- Children generally experience milder illness compared to adults.
- Age-related protective factors against severe disease and death are not fully understood.
Conclusions:
- Pediatric COVID-19 respiratory disease is a unique entity with a milder presentation.
- Understanding the underlying biological mechanisms for this difference is crucial.
- Further research is needed to elucidate age-related immune and cellular responses in pediatric COVID-19.
Purpose Of Review:
Pediatric coronavirus disease 2019 (COVID-19) respiratory disease is a distinct entity from adult illness, most notable in its milder phenotype. This review summarizes the current knowledge of the clinical patterns, cellular pathophysiology, and epidemiology of COVID-19 respiratory disease in children with specific attention toward factors that account for the maturation-related differences in disease severity.
Recent Findings:
Over the past 14 months, knowledge of the clinical presentation and pathophysiology of COVID-19 pneumonia has rapidly expanded. The decreased disease severity of COVID-19 pneumonia in children was an early observation. Differences in the efficiency of viral cell entry and timing of immune recognition and response between children and adults remain at the center of ongoing research.
Summary:
The clinical spectrum of COVID-19 respiratory disease in children is well defined. The age-related differences protecting children from severe disease and death remain incompletely understood.
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