Related by context. Frequent words. (Click for all words.) 70 asthma triggers 70 allergens 67 pet dander 65 dust mites 60 mold spores 58 pollens 56 allergen 55 allergy symptoms 55 asthma bronchitis 55 asthma allergies 55 allergic diseases 54 respiratory viruses 54 mold mildew 54 airborne contaminants 53 allergies 53 rhinitis 53 asthma sufferers 52 asthma 52 allergies asthma 52 fungal spores 51 allergic asthma 51 Allergies 51 HEPA filter 51 bacterial pathogens 50 respiratory symptoms 50 endotoxin 50 asthmatics 50 airborne particles 50 Salmonella bacteria 49 airway inflammation 49 allergy sufferers 49 airborne pollutants 49 respiratory tract 49 allergenic 49 bronchiolitis 49 respiratory infections 49 respiratory illnesses 49 germs 49 contact dermatitis 49 stressors 49 infectious organisms 49 pollutants 48 bed bugs 48 houseplants 48 mycotoxins 48 lung infections 48 ear infections 48 pollen 48 bacteria 48 bacteria fungi 48 bacterial infections 48 insect repellents 48 periodontal disease 48 sinus infections 48 eczema 47 air pollution 47 seasonal allergies 47 mites 47 VOCs 47 respiratory ailments 47 allergic reactions 47 chronic cough 47 carbon monoxide CO 47 radon 47 respiratory diseases 47 nasal congestion 47 mildew 46 sleep disordered breathing 46 microbial contamination 46 humidifier 46 IAQ 46 tick bites 46 toxins 46 viral infections 46 CO poisoning 46 infestations 46 duct cleaning 46 aerosols 46 Asthma 46 hay fever 46 intestinal bacteria 46 lung diseases 46 allergy 46 gum disease 46 particulates 46 HEPA 46 UTIs 46 secondhand smoke exposure 46 yeast infections 45 fungal diseases 45 pathogens 45 otitis media 45 IgE 45 spreading germs 45 ragweed 45 obstructive sleep apnea 45 Legionella 45 respiratory 45 pests 45 upper respiratory infections 45 skin irritations