Related by context. Frequent words. (Click for all words.) 72 respiratory diseases 72 lung disease 68 respiratory ailments 67 respiratory illnesses 61 asthma 60 chronic lung 59 respiratory 59 diseases 58 cancers 58 chronic diseases 58 cardiovascular diseases 57 respiratory infections 56 emphysema 56 chronic illnesses 56 vascular disease 55 illnesses 55 respiratory illness 55 COPD 55 cardiovascular disease 55 lung cancer 54 chronic obstructive pulmonary 54 lung 54 kidney disease 54 asthmatics 54 disease COPD 54 heart disease 53 viral infections 53 chronic bronchitis 52 ailments 52 sinusitis 51 liver disease 51 hypertension 51 atherosclerosis 50 respiratory symptoms 50 bronchitis 50 allergies 50 gum disease 50 particulates 49 fungal infections 49 pneumonia 49 lung cancers 49 coronary artery disease 48 rheumatoid arthritis 48 bacterial infections 48 inflammatory diseases 48 breathing difficulties 48 pulmonary hypertension 48 mesothelioma 48 cancer 48 obstructive sleep apnea 48 debilitating diseases 48 respiratory tract 48 deep vein thrombosis 48 lungs 48 lung function 47 lupus 47 inflammatory bowel disease 47 neurological diseases 47 arthritis 47 disorders 47 pre eclampsia 47 coronary disease 47 disease 47 air pollution 46 hay fever 46 degenerative diseases 46 neurological disorders 46 thrombosis 46 pulmonary 46 blood clots 46 angina 46 metabolic disorders 46 passive smoking 46 diabetes 46 sleep apnea 46 infectious diseases 46 malignancies 46 asbestos exposure 46 weakened immune systems 45 autoimmune diseases 45 diesel exhaust 45 cystic fibrosis 45 chronic illness 45 birth defects 45 PAH 45 sickle cell disease 45 pollutants 45 brain tumors 45 arrhythmias 45 skin cancers 45 infections 44 fibrosis 44 colon cancer 44 osteoporosis 44 sudden cardiac death 44 tuberculosis 44 chronic kidney 44 autoimmune disorders 44 chronic inflammation 44 osteoarthritis 44 Asthma