Related by context. Frequent words. (Click for all words.) 55 epidemics 55 influenza pandemics 53 influenza epidemic 53 outbreaks 52 outbreak 52 polio 51 epidemic 51 cholera outbreaks 50 bubonic plague 50 diphtheria 50 flu epidemic 49 measles 49 mumps outbreak 48 mosquito borne illness 48 Spanish flu pandemic 48 tuberculosis 48 whooping cough 48 disease 47 measles outbreak 47 small pox 47 flu pandemics 47 flu outbreak 46 infections 46 smallpox 45 pandemics 45 diarrheal disease 45 respiratory infections 45 mosquito borne disease 45 Whooping cough 45 Outbreaks 45 mosquito borne 45 scarlet fever 45 pandemic 45 Tuberculosis 44 typhoid 44 rheumatic fever 44 AIDS epidemic 44 influenza 44 mosquito borne virus 44 typhoid fever 43 poliomyelitis 43 Whooping Cough 43 contracted polio 43 Rift Valley Fever 43 syphilis 43 cholera 43 tuberculosis TB 43 waterborne disease 43 l#s 43 Ebola 43 illnesses 43 respiratory illness 42 mosquito borne diseases 42 leprosy 42 flu pandemic 42 typhus 42 famines 42 sicknesses 42 swine flu pandemic 42 pertussis 42 West Nile 42 H#N# flu pandemic 42 Aids epidemic 42 Black Plague 42 smallpox vaccinations 42 chickenpox 42 Tuberculosis TB 42 fevers 42 avian flu 42 dysentery 42 monkeypox 42 #s [002] 42 smallpox vaccination 42 hemorrhagic fever 41 malaria 41 H#N# 41 influenza pandemic 41 Smallpox 41 malady 41 meningococcal 41 spinal meningitis 41 Flu 41 avian flu outbreak 41 MRSA infections 41 meningitis 41 crises 41 salmonella outbreaks 41 infection 41 tick borne diseases 41 Marburg virus 41 tetanus 40 snake bites 40 encephalitis 40 polio virus 40 A/H#N# influenza 40 Infections 40 Lyme disease 40 rubella 40 pneumonia 40 flu 40 H#N# pandemic