Related by context. Frequent words. (Click for all words.) 69 pneumonia 66 viral infection 63 bronchitis 59 illness 58 breathing difficulties 58 bacterial infection 58 ailment 58 respiratory illness 56 mononucleosis 56 stomach bug 55 infection 55 encephalitis 53 gastroenteritis 53 abscess 53 ear infection 53 flulike symptoms 53 sore throat 53 internal bleeding 52 chicken pox 51 kidney failure 51 bacterial meningitis 51 blood clot 51 irregular heartbeat 50 staph infection 50 meningitis 50 chickenpox 50 strep throat 49 emphysema 49 respiratory 49 typhoid 49 appendicitis 48 organ failure 48 lung disease 48 upper respiratory 47 jaundice 47 colic 47 leukemia 46 tuberculosis 46 diarrhea 46 dehydration 46 allergic reaction 46 muscle strain 46 congestive heart failure 46 renal failure 45 rib injury 45 pulmonary embolism 45 collapsed lung 45 fevers 45 kidney stones 45 intensive care 45 respiratory infections 45 dengue fever 44 flu 44 brain hemorrhage 44 highly contagious 44 disease 44 virus 44 tendinitis 44 sepsis 44 chest pains 44 herniated disc 43 liver disease 43 flu virus 43 underwent surgery 43 whooping cough 43 ailments 43 sore shoulder 43 measles 43 intestinal 43 unwell 43 illnesses 43 H#N# virus 43 viral infections 43 lymphoma 43 stiff neck 43 thigh injury 42 ventilator 42 kidney disease 42 soreness 42 chronic lung 42 brain tumor 42 lung 42 groin injury 42 influenza 42 abdominal pain 42 hospitalized 42 cardiac arrest 42 complications 42 infections 42 broken rib 42 fever 42 stress fracture 41 sprained ankle 41 ulcer 41 H#N# influenza 41 antibiotics 41 cyst 41 sickness 41 asthma 41 mild concussion 41 ankle injury