Related by context. Frequent words. (Click for all words.) 73 pneumonia 69 respiratory illness 68 viral infection 66 bronchitis 62 flulike symptoms 62 bacterial infection 61 gastroenteritis 60 chicken pox 60 sore throat 60 strep throat 60 illness 60 infection 58 ailment 57 upper respiratory 57 bacterial meningitis 57 flu 56 chickenpox 55 breathing difficulties 55 stomach bug 54 staph infection 54 meningitis 54 respiratory infections 54 encephalitis 53 mononucleosis 52 influenza 52 appendicitis 51 respiratory 51 measles 51 fevers 51 irregular heartbeat 50 pertussis 50 respiratory illnesses 50 lung disease 50 pulmonary embolism 50 emphysema 49 norovirus 49 tuberculosis 49 whooping cough 49 sepsis 49 abdominal pain 49 mumps 49 allergic reaction 48 cardiac arrest 48 heat exhaustion 48 dehydration 48 diarrhea 48 infections 48 H#N# virus 48 abscess 48 liver disease 47 kidney failure 47 asthma 46 swine flu 46 MRSA 46 colds 46 blood clot 46 disease 46 typhoid 46 flu virus 46 highly contagious 46 collapsed lung 45 ear infections 45 RSV 45 jaundice 45 symptoms 45 viral infections 45 internal bleeding 45 H#N# 45 illnesses 45 Meningitis 45 fever 45 H#N# influenza 45 dengue fever 44 tendinitis 44 rib injury 44 Influenza 44 Lyme disease 44 soreness 44 unwell 44 chest pains 44 asthmatic 44 virus 44 staph 44 hospitalization 44 hepatitis 44 congestive heart failure 44 carbon monoxide poisoning 44 allergies 44 herniated disc 44 brain hemorrhage 44 Crohn disease 44 seasonal influenza 43 organ failure 43 plantar fasciitis 43 muscle strain 43 H#N# flu 43 gastrointestinal 43 vomiting 43 difficulty breathing 43 renal failure 43 hospitalized