Related by context. Frequent words. (Click for all words.) 68 cholera outbreaks 68 epidemics 60 outbreaks 57 influenza pandemics 56 cholera 54 pandemics 54 waterborne diseases 54 malaria 54 schistosomiasis 54 diarrheal disease 54 diarrheal diseases 53 cholera outbreak 53 water borne diseases 53 flu pandemics 52 famines 52 borne diseases 52 Outbreaks 51 bird flu outbreaks 51 waterborne disease 51 Diarrhoea 51 Epidemics 51 vector borne diseases 50 tropical diseases 50 outbreak 50 mosquito borne 49 mosquito borne disease 49 typhoid fever 49 Rift Valley Fever 49 mosquito borne diseases 49 droughts 49 malarial 48 floods 48 epidemic 48 Aids epidemic 48 snakebites 48 Marburg virus 48 famine 48 Droughts 48 yellow fever 48 diphtheria 48 acute diarrhea 48 floods droughts 48 malnutrition 47 cyclones 47 dengue outbreak 47 monsoon floods 47 measles 47 Ebola 47 floods landslides 47 natural disasters 46 measles outbreak 46 pandemic 46 typhoid 46 infectious diseases 46 sleeping sickness 46 flu epidemic 46 Spanish flu pandemic 46 respiratory viruses 46 bird flu epidemic 46 bubonic plague 46 heatwaves 46 dengue fever 45 snake bites 45 Dengue 45 acute respiratory infections 45 diarrhea 45 dengue 45 tsunamis 45 AIDS epidemic 45 poliomyelitis 45 Dengue fever 45 flashfloods 45 cerebral malaria 45 respiratory infections 45 dysentery 44 mass migrations 44 Cholera 44 mosquito borne illness 44 Chikungunya 44 disease 44 influenza epidemic 44 Cyclone Aila 44 cholera epidemic 44 Leptospirosis 44 temperate regions 44 Infectious diseases 44 smallpox 44 infections 44 Japanese encephalitis 44 communicable diseases 44 NTDs 44 Natural disasters 44 scarcities 44 arsenic poisoning 44 disasters 44 avian flu outbreak 44 contagious diseases 44 coral bleaching 43 prolonged drought 43 civil strife 43 natural catastrophes