Inclusion Criteria:  Children (male/female) aged from 4 to 60 months. Admitted hospital due to lower respiratory infection. RSV is positive by rapid test. Parents of the pediatric patient agree to participate in the study, explain and sign the research consent form.  Exclusion Criteria:  Newborn babies. Have a history of drug allergy. Need oxygen therapy. Discharged before day 3. Lost to follow-up. Withdrawn from the trial. Continuing in the trial but missing data. Meeting the criteria for psychiatric disorders other than depression and/or anxiety.