Related by context. Frequent words. (Click for all words.) 76 asthma bronchitis 66 asthma emphysema 66 aggravate asthma 65 respiratory irritant 63 lung diseases 62 lung ailments 61 chronic respiratory 61 respiratory ailments 61 chronic lung 59 respiratory diseases 59 respiratory illnesses 59 pulmonary disease 59 pulmonary disorders 58 coughing wheezing 58 pulmonary diseases 58 asthma 58 respiratory 57 asthma allergies 56 Chronic obstructive pulmonary 56 fatigue shortness 56 chronic bronchitis 56 Particulate matter 55 allergies asthma 55 Hydrogen sulfide 55 Prolonged exposure 55 lung disease 54 outdoor exertion 54 Passive smoking 54 chronic pulmonary 54 blindness deafness 53 airborne allergens 53 wheezing coughing 53 trigger allergic reactions 53 chronic obstructive pulmonary 53 commercializes innovative biopharmaceuticals 53 Asthmatics 53 animal dander 52 skin ulcers 52 Parkinson disease Alzheimer disease 52 cardio vascular disease 52 diarrhea abdominal pain 52 indoor allergens 52 chronic sinus 52 bronchial asthma 52 asthmatics 52 lipid disorders 51 Pre eclampsia 51 carcinogenic chemicals 51 particulates 51 diabetes cardiovascular disease 51 eye irritations 51 carbon tetrachloride 51 diarrhea nausea vomiting 51 gastric reflux 51 meningitis pneumonia 51 emphysema 51 throat irritation 51 skin rashes 51 Sulfur dioxide 51 air pollution 51 chronic cough 51 bronchiolitis 51 fine particulates 51 Obstructive sleep apnea 50 respiratory disorders 50 nitrous oxides 50 suspected carcinogen 50 thyroid disorders 50 rhythm abnormalities 50 Anxiety disorders 50 Sinusitis 50 chronic rhinosinusitis 50 secondhand tobacco 50 atopic eczema 50 respiratory illness 50 skin irritations 50 asthma chronic obstructive 50 Emphysema 50 post nasal drip 50 Shortness 50 Hospitalizations 50 diesel exhaust 50 asthmatic 50 Cigarette smoke 50 respiratory symptoms 50 pollutants emitted 49 acute gastroenteritis 49 Carbon Monoxide Poisoning 49 respiratory infections 49 Multiple sclerosis MS 49 heart arrhythmias 49 hemolytic anemia 49 soot particles 49 Sleep apnea 49 weakened immune systems 49 rheumatic disease 49 pulmonary embolism PE 49 Obstructive Sleep Apnea 49 metabolic acidosis 49 Bronchitis 49 silica dust