<qa>  What is the current standard of care at Childrens Hospital Colorado?The experimental arm will consist of patients who receive a nebulized treatment of 4ml of 3 hypertonic saline, administered by a respiratory therapist, as well as supportive care as needed. Patients in the control arm will receive supportive care only, the current standard of care at Childrens Hospital Colorado. The pharmacist will randomize patients as noted above. After consent is obtained the provider will perform a pre-intervention clinical severity score evaluation to patients in both study arms utilizing the clinical severity score tool described by Wang et al.19 Respiratory therapy will then provide the nebulized treatment for those patients randomized to receive hypertonic saline. Removal of equipment following treatment will aid in ensuring blinding of physicians to treatment arm. At 90 minutes after treatment with hypertonic saline or after the order is placed for patients in the control arm, patients in both arms will undergo a second clinical severity score by the provider. At that time the provider will turn off the oxygen administered to both treatment arms for a room air challenge. The RN will be notified that the patients are off oxygen therapy and will restart oxygen if patient has saturations 87 as indicated by continuous pulse oximetry and oxygen will be restarted at 0.5L by NC. 