Moderate to Severe Bronchiolitis: Standard Therapy Versus Therapy With NaCl 3% Inhalations

Inclusion Criteria: * children between ages 6 weeks to 24 months * first episode of wheezing * diagnosis of moderate to severe bronchiolitis: The patients are ranked as moderately to severely ill according to the Wang clinical severity score Exclusion Criteria: * Children with mild bronchiolitis (Wang score \< 5) * Children with pre-existent cardiac disease * Children with clinically significant chronic respiratory disease * Immunocompromised children * Children with a gestational age at birth less than 34 weeks * Children who received immunoprophylaxis therapy (i.e RSV immune globulin therapy) * Children who received corticosteroid in any form in the preceding 2 weeks before presentation * Children who received bronchodilators within 24 hours before presentation * Children with critical illness at presentation requiring immediate admission to intensive care unit