Table 4: Result of the etiologic viral characterization.

Total n = 161 HRV HPIV 1 HPIV 2 HPIV 3 Adenovirus
n % n % n % n % n %
Positive 35 22% 23 14% 72 45% 18 11% 17 11%
Negative 126 78% 138 86% 89 55% 143 89% 144 89%