Related by context. Frequent words. (Click for all words.) 62 droplets 57 fungal spores 57 respiratory droplets 56 aerosol particles 56 liquid droplets 55 droplet 55 tiny droplets 54 bacilli 53 particles 52 secretions 51 spores 51 water vapor 51 aerosols 50 aerosol 49 mucous membrane 49 microbubbles 49 metal ions 49 alpha particles 49 urushiol 49 dust particles 48 particulates 48 soot particles 48 noxious chemicals 48 vapor 48 viral particles 48 Influenza viruses 48 mist 47 airborne particles 47 harmful microbes 47 ultrasonic waves 47 pollen grains 47 Hydrogen sulfide 47 HEPA filters 47 vapors 47 ionized 47 ultrafine particles 47 airstream 47 aqueous solution 46 digestive juices 46 ultra violet light 46 oxidant 46 germicidal 45 aldehydes 45 hydrogen ions 45 respiratory tract 45 laminar flow 45 airborne contaminants 45 bacteria 45 bactericidal 45 exhaust gases 45 Hydrogen peroxide 45 liquid 45 microparticles 45 stomach acids 45 exhalations 45 odorants 45 Malathion 45 germs 45 mucus 45 alveoli 45 spray nozzles 44 naturally occurring bacteria 44 infectious pathogens 44 pollens 44 DMSO 44 colorless liquid 44 particle 44 carbonic acid 44 HEPA filter 44 ultra violet rays 44 droplet size 44 emollients 44 nasal passages 44 aerosolized 44 lipophilic 44 silver ions 44 Sulfur dioxide 44 exhalation 44 microscopic particles 44 harmful pathogens 44 hydroxide 44 unpleasant odor 44 cirrus clouds 44 exhaled breath 44 excretions 44 respiratory secretions 44 sprays 44 thick mucus 44 towelettes 44 reactants 44 molecules 44 particulate matter 43 capillaries 43 harmful toxins 43 mucous 43 flue gases 43 microchannels 43 inoculum 43 Legionella bacteria 43 Staph bacteria 43 endotoxins