Related by context. Frequent words. (Click for all words.) 70 pneumonia 64 bacterial infection 64 bacterial meningitis 61 viral infection 60 respiratory infection 60 infection 59 influenza 58 lung infection 58 encephalitis 58 chickenpox 58 H#N# virus 57 respiratory illness 57 meningitis 57 chicken pox 56 flu 56 gastroenteritis 56 flu virus 56 mumps 55 meningococcal disease 54 infections 54 illness 54 bronchitis 54 kidney failure 53 strep throat 53 influenza virus 53 typhoid fever 53 swine flu 53 pancreatitis 53 measles 53 influenza viruses 52 ailment 52 virus 52 pertussis 52 H#N# strain 52 whooping cough 52 flulike symptoms 52 H#N# influenza 52 H#N# 52 seasonal influenza 51 sore throat 51 flu viruses 51 H#N# influenza virus 51 respiratory infections 51 tonsillitis 51 staph infection 51 liver cancer 51 coronavirus 51 norovirus 50 mosquito borne disease 50 severe diarrhea 50 urinary tract infection 50 swine flu virus 50 highly contagious 50 bacterial infections 50 dengue fever 50 septic shock 49 ear infection 49 septicemia 49 disease 49 cardiomyopathy 49 Pneumonia 49 pulmonary hypertension 49 colds 48 H#N# flu 48 acute myeloid leukemia 48 flu strains 48 respiratory illnesses 48 appendicitis 48 tuberculosis 48 contagious disease 48 blood clot 48 lung disease 47 chronic lung 47 leukemia 47 rotavirus 47 RSV 47 seasonal flu 47 acute lymphoblastic leukemia 47 liver disease 47 conjunctivitis 47 MRSA infections 47 mononucleosis 47 Influenza 47 internal bleeding 47 fevers 47 bird flu virus 47 flu bug 47 lymphoma 47 dengue 47 fungal infection 46 staph 46 upper respiratory 46 viral infections 46 sepsis 46 diarrhea 46 XDR TB 46 renal failure 46 pulmonary embolism 46 blood clots 46 brain haemorrhage 46 West Nile virus