Many students have chronic breathing problems, most common of which are bronchial asthma and emphysema.  Respiratory problems are characterized by attacks of shortness of breath and difficulty breathing, sometimes triggered by stress, either physical or mental.  Fatigue and difficulty climbing stairs may also be major problems, depending on the attacks.    Frequent absences may occur and hospitalization may be required when prescribed medication fails to relieve the symptoms.  For appropriate classroom accommodations, refer to the appropriate section that applies.