Figure 1.

Consort diagram for study enrollment (see Supplementary Materials for additional details). ARI defined as the presence of  ≥1 of the following symptoms: nasal congestion, rhinorrhea, sore throat, hoarseness, cough, sputum production, dyspnea, wheezing; an admitting diagnosis suggestive of ARI (pneumonia, upper respiratory infection, bronchitis, lower respiratory infection, bronchiolitis, influenza, cough, asthma, viral illness, respiratory distress, respiratory failure); or congestive heart failure exacerbation. Abbreviation: ARI, acute respiratory illness.