Related by context. Frequent words. (Click for all words.) 70 outbreaks 69 pandemics 68 epidemic 62 pandemic 59 infectious diseases 59 flu pandemics 57 diseases 57 communicable diseases 57 water borne diseases 57 borne diseases 56 outbreak 56 waterborne diseases 55 influenza pandemic 55 disease 54 famines 54 flu pandemic 54 cholera 54 infectious disease 53 infections 53 cholera outbreak 53 natural disasters 53 contagious diseases 53 bird flu epidemic 53 malaria 52 avian flu 52 disasters 52 flu epidemic 52 AIDS epidemic 52 crises 51 tropical diseases 51 contagious disease 51 Outbreaks 50 scourges 50 communicable disease 50 bird flu outbreaks 50 HIV AIDS pandemic 50 diarrheal diseases 50 cholera epidemic 50 pandemic influenza 50 communicable 50 catastrophes 49 pestilence 49 measles outbreak 49 waterborne disease 49 H#N# pandemic 48 AIDS pandemic 48 calamities 48 famine 48 bird flu pandemic 48 Avian influenza 48 Avian flu 48 HIV AIDS epidemic 48 mosquito borne diseases 48 Marburg virus 48 malnutrition 48 drug resistant strains 48 dengue fever 47 mosquito borne disease 47 heatwaves 47 preventable diseases 47 Ebola 47 infection 47 bubonic plague 47 sicknesses 47 pandemic flu 47 resistant strains 46 plague 46 bird flu outbreak 46 Dengue 46 HIV AIDS malaria 46 dengue 46 Tuberculosis 46 droughts 46 non communicable diseases 46 antibiotic resistance 46 natural calamities 46 tuberculosis TB 46 tsunamis 46 viruses 46 pathogens 46 Diseases 45 forest fires 45 bird flu 45 influenza 45 pandemic strain 45 measles 45 Dengue fever 45 MDR TB 45 viral infections 45 viral diseases 45 influenza viruses 45 poultry flocks 44 bacterial infections 44 HIV infections 44 flu outbreak 44 avian flu pandemic 44 avian influenza 44 HIV AIDS 44 populations 44 influenza strains 44 swine flu pandemic