Related by context. Frequent words. (Click for all words.) 72 virus mutates 65 easily transmissible 61 bird flu virus 60 flu virus 60 mutate 60 H#N# strain 59 mutates 59 pandemic 59 sparking pandemic 59 virus 58 H#N# avian flu 58 avian flu 58 pandemic strain 57 bird flu 57 influenza virus 57 highly pathogenic 57 transmissible 56 H#N# 56 avian flu virus 56 H#N# virus 55 H#N# avian influenza 55 influenza 55 swine flu virus 55 flu viruses 55 flu pandemic 55 infect humans 55 avian influenza virus 55 avian virus 55 H#N# bird flu 54 influenza viruses 54 avian influenza 54 bird flu strain 54 deadly H#N# virus 54 pandemic flu 53 H#N# swine flu 53 influenza pandemic 52 bird flu pandemic 52 Avian Flu 52 bioterrorist attack 52 mosquito borne disease 52 Tamiflu 52 highly contagious 52 Avian influenza 51 H#N# influenza virus 51 virulent H#N# strain 51 Ebola 51 Rift Valley fever 51 flu strains 51 contagious disease 51 virus infects 51 mutating 50 Avian flu 50 pandemic influenza 50 antiviral drugs 50 swine flu 50 smallpox virus 50 avian influenza viruses 50 antiviral medicines 50 dengue virus 50 influenza A/H#N# 49 A/H#N# influenza 49 Salmonella bacteria 49 cholera 49 viral strains 49 highly pathogenic H#N# strain 49 micro organism 49 communicable 49 H#N# Swine Flu 49 antiviral medication 49 Monkeypox 49 plugin document.write 49 H#N# influenza 49 resistant strains 49 infecting humans 49 mosquito borne virus 49 H#N# flu 49 bird flu epidemic 49 A/H#N# 49 vaccine 49 HPAI 49 viruses 49 chikungunya 49 Bird flu 49 Oseltamivir 48 bacterium 48 virulent strain 48 diarrheal disease 48 infected 48 Ebola virus 48 multidrug resistant 48 pandemic H#N# 48 deadly H#N# strain 48 highly pathogenic avian influenza 48 seasonal flu 48 seasonal influenza 48 Marburg virus 48 mosquito borne illness 48 A/H#N# virus 48 flu 48 avian flu pandemic 48 superbug