Child characteristics associated with each symptomatic ARI episode that was tested for the presence of respiratory viruses.

Data represent percentages (95% CI) unless otherwise indicated. *P<0.05 for strength of association in logistic regression model, adjusting for correlation at the level of the individual child. †In total, 772 (86.5%) of the 892 children enrolled in the study had at least one ARI for which a NS sample was tested.