For both groups, the drug will be administered as an aerosol using a face mask. This will require you to be in a tent while you are receiving therapy. Treatment will last between 5 and 10 days. This will require hospitalization. In addition to ribavirin treatment, you will also receive Xopenex inhalation therapy every 6 - 8 hours. Xopenex is a drug designed to make breathing easier. We may need to use another breathing treatment, albuterol inhalation therapy for one time if needed, directly after receiving ribavirin to make breathing easier.