Criteria: Patients age 3-36 months admitted to the BCCH ED with fever(≥38.5 0C measured in ED or documented by the accompanying parent) and at least one of: cough, runny nose, nasal congestion and sore throat will be eligible for enrolment. Excluded from the study will be patients who are immuno-compromised, who have underlying chronic severe respiratory conditions (cystic fibrosis, bronchopulmonary dysplasia) or chronic heart conditions (uncorrected cyanotic heart lesions, prosthetic valves), who have had prior assessment in our ED department for the current illness. Only one child per family can be enrolled.