The eligible children, for whom parental consent has been obtained, will be randomized to one of three groups (standard dose, low dose, or placebo). The standard dose group will receive an oral aqueous solution using the standard dose of CVT-E002, adjusted according to the child's weight. The second group will receive an oral aqueous solution with half of the standard dose of CVT-E002, adjusted according to the child's weight, and the third group will receive a placebo as an aqueous solution of starch that does not contain any CVT-E002 or active medication, volume adjusted for the child's weight. Parents will be provided with a 3-day supply of study medication according to the randomization schedule. CVT-E002 will be administered by the parent to the child three times daily for three consecutive days following the onset of a URTI. Severity and duration of URTI will be measured using the reliable and valid Canadian Acute Respiratory Infection Flu Score (CARIFS).