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Published on: July 12, 2024
Air pollution might affect the clinical course of COVID-19 in pediatric patients
Piotr Rzymski1, Barbara Poniedziałek2, Joanna Rosińska2
1Department of Environmental Medicine, Poznan University of Medical Sciences, 60-806 Poznań, Poland; Integrated Science Association (ISA), Universal Scientific Education and Research Network (USERN), 60-806 Poznań, Poland.
Insights
Air pollution, specifically higher benzo(a)pyrene levels, worsened COVID-19 symptoms and prolonged hospital stays in children. This highlights air quality
Area of Science:
- Environmental Health
- Pediatric Pulmonology
- Infectious Diseases
Background:
- Children exhibit heightened susceptibility to air pollution, which can exacerbate airway inflammation and respiratory viral infections.
- Previous research indicates potential links between air pollutants and respiratory illness severity, but pediatric COVID-19 specific data is limited.
- Particulate matter 2.5 (PM2.5) and benzo(a)pyrene (B(a)P) are key indicators of air quality with known health impacts.
Purpose of the Study:
- To investigate the association between pre-hospitalization exposure to PM2.5 and B(a)P and the clinical presentation of COVID-19 in unvaccinated pediatric patients.
- To determine if air quality influences symptom severity, inflammatory markers, and length of hospital stay in pediatric COVID-19 cases.
- To analyze age-specific differences in the impact of air pollution on pediatric COVID-19 outcomes.
Main Methods:
- Retrospective analysis of 766 unvaccinated pediatric patients hospitalized with COVID-19 in Poland.
- Assessment of daily average and maximum levels of PM2.5 and B(a)P in the week preceding hospitalization.
- Statistical analysis correlating air pollutant concentrations with clinical symptoms, inflammatory markers (CRP, IL-6, procalcitonin, WBC), and length of stay.
Main Results:
- Elevated B(a)P levels (>1 ng/m3) were linked to increased odds of cough, dyspnea, fever, and inflammatory markers in children ≤12 years.
- In adolescents (13-17 years), higher mean B(a)P levels correlated with increased odds of dyspnea, fever, diarrhea, and elevated CRP/procalcitonin.
- Exposure to high PM2.5 levels (>20 µg/m3) was associated with increased cough, CRP (≤12 years), and procalcitonin (both age groups), and extended hospital stays for both age groups.
Conclusions:
- Worse air quality, particularly elevated B(a)P concentrations, is associated with more severe clinical manifestations of COVID-19 in pediatric patients.
- Air pollution exposure may contribute to increased disease burden and prolonged recovery times in children hospitalized with COVID-19.
- Findings underscore the importance of air quality monitoring and mitigation strategies in protecting pediatric populations during respiratory pandemics.
Abstract:
Air pollution, to which children are more susceptible than adults, can promote airway inflammation, potentially exaggerating the effects of respiratory viral infection. This study examined the association between the clinical manifestation of COVID-19 in unvaccinated pediatric patients hospitalized in Poland (n = 766) and levels of particulate matter 2.5 (PM2.5) and benzo(a)pyrene (B(a)P) within a week before hospitalization. Children aged ≤ 12 years exposed to mean and max 24 h B(a)P levels > 1 ng/m3 revealed higher odds of cough, dyspnea, fever, and increased concentrations of inflammatory markers (C-reactive protein, interleukin-6, procalcitonin, white blood cell count). In older patients (13-17 years), elevated mean 24 h B(a)P levels increased odds of dyspnea, fever, and diarrhea, and higher concentrations of C-reactive protein and procalcitonin. Exposure to max 24 h PM2.5 levels > 20 µg/m3 was associated with higher odds of cough, increased concentrations of C-reactive protein (group ≤12 years), and increased procalcitonin concentration (groups ≤12 years and 13-17 years). In both age groups, length of stay was extended in patients exposed to elevated levels of max 24 h PM2.5, mean and max 24 h B(a)P. This study suggests that worse air quality, particularly reflected in increased B(a)P levels, might affect the clinical course of COVID-19 in pediatric patients and adds to the disease burden during a pandemic.
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