= 0.0012), and longer duration of cough before admission (p<0.0001) for patients with acute HBoV infections than for patients with rhinovirus infections. However, children infected with rhinovirus had a higher leukocyte count at the time of admission (p = 0.0002). When compared with patients infected with RSV, patients infected with HBoV showed longer duration of cough before admission (p = 0.019). Differences in clinical variables were not observed for rhinovirus or RSV, whether in children with single infections or those co-infected with HBoV. We found no differences between children co-infected with HBoV and 1 or 2 other viruses. Nonrespiratory symptoms, including diarrhea, were rare (Table 3) .