Abbreviations: LOS, length of stay; ICU, intensive care unit; IQR, interquartile range; Flu, influenza; RV/EV, rhinoviruses/ enteroviruses; CoV, coronavirus; RSV, respiratory syncytial virus; PIV, parainfluenza viruses; HMPV, human metapneumovirus; AV, adenovirus.

^aIncludes patients reported to have equivocal detection of influenza A.

^bIncludes patients with more than one virus detected.