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. 2023 Feb 8;76(3):e280-e290.
doi: 10.1093/cid/ciac477.

Life-Threatening Complications of Influenza vs Coronavirus Disease 2019 (COVID-19) in US Children

Collaborators, Affiliations

Life-Threatening Complications of Influenza vs Coronavirus Disease 2019 (COVID-19) in US Children

Natasha B Halasa et al. Clin Infect Dis. .

Abstract

Background: Clinical differences between critical illness from influenza infection vs coronavirus disease 2019 (COVID-19) have not been well characterized in pediatric patients.

Methods: We compared demographics, clinical characteristics, and outcomes of US children (aged 8 months to 17 years) admitted to the intensive care or high-acuity unit with influenza or COVID-19. Using mixed-effects models, we assessed the odds of death or requiring life support for influenza vs COVID-19 after adjustment for age, sex, race and Hispanic origin, and underlying conditions including obesity.

Results: Children with influenza (n = 179) were younger than those with COVID-19 (n = 381; median, 5.2 years vs 13.8 years), less likely to be non-Hispanic Black (14.5% vs 27.6%) or Hispanic (24.0% vs 36.2%), and less likely to have ≥1 underlying condition (66.4% vs 78.5%) or be obese (21.4% vs 42.2%), and a shorter hospital stay (median, 5 days vs 7 days). They were similarly likely to require invasive mechanical ventilation (both 30.2%), vasopressor support (19.6% and 19.9%), or extracorporeal membrane oxygenation (2.2% and 2.9%). Four children with influenza (2.2%) and 11 children with COVID-19 (2.9%) died. The odds of death or requiring life support in children with influenza vs COVID-19 were similar (adjusted odds ratio, 1.30; 95% confidence interval, .78-2.15; P = .32).

Conclusions: Despite differences in demographics and clinical characteristics of children with influenza or COVID-19, the frequency of life-threatening complications was similar. Our findings highlight the importance of implementing prevention measures to reduce transmission and disease severity of influenza and COVID-19.

Keywords: COVID-19; SARS-CoV-2; children; influenza; intensive care units.

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Conflict of interest statement

Potential conflicts of interest. N. B. H. reports grants or contracts from Sanofi and Quidell outside of the submitted work and an educational grant for honorarium from Genentech. M. M. B. reports grants or contracts from the National Institutes of Health (NIH)/National Institute of Neurological Disorders and Stroke, Grifols Investigator Sponsored Research Grant, and NIH/ Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) outside of the submitted work and paid to institution. B. M. C. reports grants or contracts from the NIH, American Thoracic Society, and American Lung Association outside the submitted work and paid to institution and payment to author for expert testimony from Triplett Woolf Garretson, LLC. N. Z. C. reports grants or contracts from the NIH outside of the submitted work. H. R. F. reports grants or contracts from the NIH, National Heart, Lung, and Blood Institute (NHLBI), and NICHD outside of the submitted work; support for attending meetings and/or travel from the Society of Critical Care Medicine; participation on a data and safety monitoring board (DSMB) for a cardiothoracic surgery trial (single center) and a DSMB for an intrathecal chemotherapy trial; an unpaid position on the Michigan Thoracic Society Executive Committed and Pediatric Acute Lung Injury and Sepsis Investigators network Executive Committee; and the following other financial or nonfinancial interests: Lucira Health advisory committee and Aerogen Pharma advisory unfunded. M. W. H. reports grants or contracts from the NIH and royalties from Kiadis outside of the submitted work; participation on a DSMB or advisory board for AbbVie and La Jolla Pharmaceuticals (payment to author); and leadership or fiduciary role on the American Board of Pediatrics (payment to author). J. R. H. reports grants or contracts from the NIH–NICHD outside of the submitted work and participation on a DSMB for an institutional study at the University of Minnesota (no financial reimbursements). M. K. reports grants or contracts from the NIH outside of the submitted work to institution. E. R. L. reports grants or contracts from the NIH outside of the submitted work and paid to institution. M. M. Nakamura reports grants or contracts from Gilead for participation in their remdesivir trial. R. A. N. reports grants or contracts from the NIH outside of the submitted work. C. M. R. reports grants or contracts from the NIH outside of the submitted work and payment for honoraria to author for the Contemporary Critical Care Complications of SCT/Cellular Therapies Conference by MD Anderson. J. E. S. reports grants or contracts from Merck outside of the submitted work and paid to institution. M. S. Z. reports grants or contracts from the NIH outside of the submitted work and paid to institution. A. G. R. reports grants or contracts from the National Institute of Allergy and Infectious Diseases to institution outside of the submitted work; royalties or licenses from UpToDate as a Pediatric Critical Care Section Editor paid to author; and is an unpaid treasurer for International Sepsis Forum. M. L. C. reports grants or contracts to institution for projects unrelated to this work from the CDC. J.C.F. reports an NIH award unrelated to this study and paid to institution. C. V. H. reports payment or honoraria as a consultant for Biofire (bioMérieux). G. E. M. reports payment for expert testimony in a malpractice case involving influenza related death. All remaining authors: No reported conflicts of interest. All authors have submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Conflicts that the editors consider relevant to the content of the manuscript have been disclosed.

Figures

Figure 1.
Figure 1.
Age distribution of critically ill children with influenza (n = 179) compared with those with COVID-19 (n = 381). Abbreviation: COVID-19, coronavirus disease 2019.
Figure 2.
Figure 2.
Symptoms at presentation of critically ill children with influenza (n = 179) compared with those with COVID-19 (n = 381). Abbreviation: COVID-19, coronavirus disease 2019.
Figure 3.
Figure 3.
Comparison of multiorgan involvement in children with severe influenza (A) and children with coronavirus disease 2019 (B).
Figure 4.
Figure 4.
Median length of hospital stay (A) and ICU stay (B) by age group of critically ill children with influenza (n = 179) compared with those with COVID-19 (n = 381). Abbreviations: COVID-19, coronavirus disease 2019; ICU, intensive care unit.

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