bronchial asthma

air airway allergy asthma bacteria breathing bronchi bronchial bronchioles bronchitis bronchoconstriction bronchodilators cells chest chronic cold cortisone cough difficulty disease dust dyspnea eosinophils genetic infection inflammation inhaler lack lungs lymphocytes mast mites mold mucus obstruction pathology pollen predisposition pulmonologist severe stress tightness viruses wheeze