Related by context. Frequent words. (Click for all words.) 62 pandemics 57 flu pandemics 56 pandemic 54 epidemics 54 Avian influenza 54 Infectious diseases 54 Viruses 52 Outbreaks 52 pandemic influenza 51 Avian Flu 51 influenza pandemic 51 Tsunamis 51 Natural disasters 50 H#N# Swine Flu 50 Smallpox 50 flu pandemic 50 Disasters 50 Listeriosis 49 Droughts 49 Recessions 49 Ebola 49 Pertussis 49 Flu 49 Pandemic Influenza 49 Swine Flu 48 Avian flu 48 Natural Disasters 48 Crises 48 flu epidemic 48 H#N# Influenza 47 seasonal influenza 47 flus 47 Diarrhoea 47 pandemic flu 47 Spanish flu pandemic 47 Pandemic 47 Influenza 46 H#N# 46 H#N# Flu 46 influenza viruses 46 cholera outbreaks 46 Avian Influenza 46 Pathogens 46 Seasonal flu 46 influenza 46 Bioterrorism 45 Tuberculosis 45 Infection 45 Staph 45 H#N# pandemic 45 flu strains 45 Colds 45 Outbreak 45 Epidemic 45 avian flu pandemic 45 influenza virus 45 Superbug 45 Dengue 45 flu outbreak 45 Flu Season 45 Dengue fever 44 avian flu 44 Bird Flu 44 Pneumonia 44 Plague 44 Fundamentalism 44 outbreaks 44 flu viruses 43 Emergencies 43 H#N# flu pandemic 43 infect humans 43 Tragedies 43 Whooping cough 43 Chikungunya 43 infectious disease 43 seasonal flu 43 Vaccinations 43 pandemic H#N# 43 Infections 43 Tetanus 43 Bird flu 43 Stagflation 43 communicable 43 Eating disorders 43 heatwaves 43 influenza strains 43 mosquito borne 42 Diseases 42 H#N# avian flu 42 respiratory viruses 42 natural disasters 42 Rabies 42 viruses 42 bird flu pandemic 42 virus mutates 42 borne diseases 42 Cholera 42 Swine flu 42 Terrorism 42 flu virus 42 epidemic