Related by context. Frequent words. (Click for all words.) 76 mutates 75 virus mutates 68 mutating 64 sparking pandemic 54 mutated 54 infect humans 50 transmissible 50 flu viruses 50 influenza viruses 50 morph 48 avian virus 46 pandemic strain 45 bird flu virus 44 H#N# strain 44 highly contagious 44 flu virus 44 avian flu virus 44 influenza virus 44 flu strains 43 infect 42 metastasize 42 virulent 42 recombine 42 H#N# avian flu 41 avian influenza virus 41 highly pathogenic 40 drug resistant strains 40 evolve 40 virulent strain 40 metamorphose 40 communicable 39 Avian influenza 39 virus 38 bacterium 38 bird flu strain 38 resistant strains 38 viruses 38 organism 38 pandemic 38 germs 38 Staph 38 contagious 37 fissile core 37 retroviruses 37 cause bloody diarrhea 37 influenza strains 37 sicken 37 evolves 37 H#N# avian influenza 37 avian flu 37 Mycobacterium tuberculosis 36 H#N# bird flu 36 weakened immune systems 36 Salmonella bacteria 36 infectious 36 H#N# viruses 36 pathogens 36 morphing 36 infects 36 malaria parasite 36 morphs 36 mutation 36 epidemics 36 humans 36 intermingle 36 Left untreated 36 germ 36 amoeba 36 multidrug resistant TB 35 cross pollinate 35 smallpox virus 35 infected mosquito 35 degrades another 35 swine flu virus 35 northern Leeward Islands 35 contaminate 35 infecting 35 pandemics 35 H#N# virus 35 contagious disease 35 manifest itself 35 bacterial resistance 35 DVD MPEG AVI 35 meld 35 Bird flu 35 TB bacteria 34 influenza pandemic 34 Avian flu 34 Prospective advertising 34 excrete 34 resistant bacteria 34 Viruses 34 deadlier 34 bacteria 34 WMV MP4 iPod 3GP 34 Germs 34 flus 34 antibiotic resistance 34 proliferate 34 weak ADX indicates 34 disintegrate