<prompt> A 3 Month old Child presents with Biphasic stridor and Barking cough. All are true eXceptHypopharyngeal dila on and subglottic stenosis on X-RayInvolve subglottis most commonlyMale are involved more commonly than femaleAntibiotics are used as an initial treatment  <response>: Acute bronchioli s is predominantly a viral disease. Respiratory syncytial virus RSV is responsible for 50 of cases. Treatment For infants 3 yr of age, it is acceptable to continue to administer inhaled medications through an MDI with mask and spacer if a therapeutic benefit is demonstrated. ref: KD Tripathi 8th ed. 