Related by context. Frequent words. (Click for all words.) 62 respiratory infections 61 bacterial infections 59 lung diseases 58 respiratory diseases 58 bronchiolitis 57 viral infections 57 bacterial pneumonia 56 diseases 56 infections 55 bacterial infection 55 respiratory 55 fungal infections 54 sinus infections 54 pneumonia 54 weakened immune 54 severe diarrhea 54 diarrhea 54 diarrheal diseases 54 ear infections 53 RSV infection 53 bloodstream infection 53 respiratory illnesses 52 diarrheal disease 52 respiratory syncytial virus 52 respiratory ailments 52 urinary tract infections 52 asthma 52 respiratory tract infection 52 asthma allergies 51 viral pneumonia 51 allergies 51 lung ailments 51 acute respiratory infections 51 ARDS 51 kidney failure 51 disease 51 allergic diseases 51 Bacterial meningitis 51 bronchiectasis 51 respiratory disorders 51 illnesses 51 parasitic infection 51 fungal infection 51 kidney disease 50 Left untreated 50 asthma bronchitis 50 infection 50 chronic lung 50 respiratory infection 50 allergic reactions 50 suppressed immune 50 skin ulcers 50 Staph infections 50 respiratory tract 50 UTIs 49 respiratory viruses 49 respiratory tract infections 49 lung infection 49 metabolic disorder 49 lung disease 49 acute diarrhea 49 sinusitis 49 pulmonary diseases 49 weakened immune systems 49 iron overload 49 liver disease 49 breathing difficulties 49 toxoplasmosis 49 infectious diseases 49 inflammations 49 respiratory illness 49 gum disease 49 chronic diseases 48 periodontitis 48 chronic cough 48 croup 48 allergic asthma 48 gastric ulcers 48 sepsis 48 hemolytic uremic syndrome 48 upper respiratory infections 48 respiratory distress syndrome 48 lung inflammation 48 cystic fibrosis CF 48 Clostridium difficile infection 48 acute renal failure 48 peritonitis 48 chronic sinusitis 48 Streptococcus pneumoniae 48 emphysema 48 airway inflammation 48 compromised immune 48 bladder infections 48 pulmonary hypertension 47 peptic ulcers 47 amyloidosis 47 eczema 47 colitis 47 pneumococcus 47 viral infection 47 acute bronchitis