Related by context. Frequent words. (Click for all words.) 78 outdoor exertion 61 asthma emphysema 58 asthma bronchitis 54 coughing wheezing 52 Asthmatics 52 venturing outdoors 52 lung ailments 51 asthma triggers 51 ozone smog 51 stay indoors 50 respiratory ailments 50 lung diseases 50 chronic respiratory 50 wear sunscreen 50 asthmatics 50 airborne allergens 49 aggravate asthma 49 outdoors 49 insect repellent containing DEET 49 exertion 49 Vitamin D supplements 49 respiratory illnesses 49 dress warmly 48 physical exertion 48 indoor allergens 48 allergy triggers 48 containing DEET 48 tick bites 48 lung disease 48 pulmonary disorders 48 caffeinated beverages 47 compromised immune 47 Dress warmly 47 avoid mosquito bites 47 CDC recommends 47 fine particle pollution 47 Stay hydrated 47 weakened immune systems 47 fatigue shortness 47 severe renal impairment 46 airborne pollutants 46 coughing spells 46 chronic lung 46 wheezing coughing 46 respiratory diseases 46 itchy watery eyes 46 Aerobic exercise 46 flammable vegetation 46 mosquito borne illnesses 46 ozone concentrations 46 strenuous exercise 46 fluid intake 46 respiratory illness 46 respiratory symptoms 45 Dress appropriately 45 stay hydrated 45 runny nose sore throat 45 cough sore throat 45 kidney dysfunction 45 animal dander 45 rhythm abnormalities 45 meningitis pneumonia 45 sneezing runny nose 45 overexertion 45 chronic illnesses 45 cough etiquette 45 fever chills headache 45 asthma exacerbations 45 Prolonged exposure 45 immuno compromised 44 raw sprouts 44 harmful ultraviolet rays 44 cardio vascular disease 44 fine particulates 44 air pollution 44 hypoxemia 44 asthma sufferers 44 ultraviolet UV radiation 44 sensible precautions 44 proper hydration 44 snowfall accumulations 44 CO poisoning 44 silica dust 44 unhealthful 44 Obstructive sleep apnea 44 caffeine intake 44 tick infested 44 diarrheal illness 44 Wind chills 44 colds flu 44 pet dander 44 Allergic reactions 44 Reye syndrome 44 Avoid touching 43 respiratory 43 thyroid glands 43 Dust mites 43 Algae blooms 43 UV exposure 43 bloody stools 43 Viral meningitis