Should you be concerned with this scenario? What is concerning? What might you say to the mother?

Bradley is a 5 year old with a history of moderate asthma who was started on oral steroids yesterday after visiting his pediatrician for an asthma exacerbation. In addition, he has been receiving aerosol treatments every 4 hours since yesterday. He received his last levalbuterol nebulizer treatment 3 hours ago. His mother has brought him back to the office because she is concerned that he does not seem to be getting any better.
Should you be concerned with this scenario? What is concerning? What might you say to the mother?