1 Section of Critical Care Medicine, Department of Pediatrics, University of Colorado School of Medicine, Aurora.
2 Section of Informatics and Data Science, Department of Pediatrics, University of Colorado School of Medicine, Aurora.
3 Division of Critical Care, Department of Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, Illinois.
4 Department of Biochemistry and Molecular Genetics and the Center for Health Artificial Intelligence, University of Colorado School of Medicine, Aurora.
5 Department of Biomedical Informatics, Stony Brook University, Stony Brook, New York.
This cohort study uses data from the US National COVID Cohort Collaborative to evaluate upper airway infections in children during the surge of the Omicron (B.1.1.529) variant of SARS-CoV-2 in the US.