Related by context. Frequent words. (Click for all words.) 65 cough sneeze 64 nasal secretions 63 bacilli 62 respiratory droplets 59 fungal spores 58 Pneumonic plague 58 Dust mites 58 digestive juices 58 bacteria 57 bacterial spores 57 Immune cells 56 viral particles 56 secretions 56 Influenza viruses 56 blowholes 55 mouthparts 55 Genital herpes 55 bronchial tubes 55 chickenpox virus 55 thyroid glands 55 mucous membrane 55 droplets 55 respiratory secretions 55 TB bacteria 55 Staph bacteria 55 spores 55 bacterium 54 stomach acids 54 tiny droplets 54 Ultraviolet light 54 meconium 54 pathogenic organisms 54 Flu viruses 54 anaerobic bacteria 54 latent TB infection 54 thick mucus 54 alveoli 53 germs 53 pneumonias 53 lymph vessels 53 meningococcal bacteria 53 parasitic worms 53 airborne allergens 53 urushiol 53 harmful microorganisms 53 nasal passages 53 rhinovirus 53 bacterial pathogen 52 Salmonella bacteria 52 sneezing coughing 52 cell cytoplasm 52 microorganism 52 mucous membranes 52 peritoneal cavity 52 infectious organisms 52 respiratory tract 52 bloodstream 52 infectious prions 52 coughing sneezing 52 herpes viruses 52 pulmonary TB 51 micro organisms 51 lungs 51 latent infection 51 aspirate 51 fecal oral 51 toxin 51 microorganisms 51 respiratory irritant 51 seasonal influenza virus 51 genital tract 51 Langerhans cells 51 bacterial toxins 51 sensory nerves 51 female reproductive tract 51 varicella zoster virus 51 Klebsiella pneumoniae 51 Nerve cells 51 vaginal secretions 51 gastro intestinal tract 51 dehydration abdominal pain 50 odorless colorless gas 50 candida 50 mucus 50 Nitrogen oxides 50 wheezing coughing 50 Dengue virus 50 pathogenic bacteria 50 protozoa 50 latent tuberculosis 50 staph bacteria 50 naturally occurring bacteria 50 mucous 50 Bacterium 50 organism 50 infective 50 granulocytes 50 Spores 50 respiratory tracts 50 inactivated virus 50 microbe