Cumulative incidence of progression to HCoV LRTI by day 90 among 279 patients presenting with first HCoV URTI.P value is < .01 with Gray’s tests. Among 129 patients with no steroid, none of 13 patients with glucose values >150 mg/dL progressed to LRTI and 7 of 116 (6%) patients with glucose values ≤150 mg/dL or unknown progressed to LRTI. With the limited sample size, we combined those as a group of no steroid use.