Conditions affecting breathing and lungs
COPD (chronic bronchitis, emphysema), pulmonary fibrosis, asthma, cystic fibrosis, bronchiectasis, respiratory failure, chronic pulmonary hypertension, lung transplants.
Medical evidence (history, exams, imaging, lab tests) showing a severe breathing problem. Pulmonary function tests (like spirometry showing how much air you can blow out) are very important, and results must meet specific levels. For conditions like asthma or cystic fibrosis, specific test results or documented severe attacks/complications are needed.