Related by context. Frequent words. (Click for all words.) 63 Influenza viruses 62 virus mutates 62 flu viruses 59 influenza viruses 57 flu strains 57 Flu viruses 57 infects humans 57 influenza virus 54 avian flu viruses 54 mutating 54 BCG vaccine 54 influenza strains 53 mutates 53 flu virus 53 pandemic H#N# virus 52 H#N# strain 52 infect humans 52 viral strains 52 viruses 51 virulent strains 51 avian influenza viruses 51 influenza 51 Seasonal influenza 51 seasonal influenza 50 virus 50 mutate 50 zoonotic disease 49 H#N# viruses 49 transmissibility 49 respiratory viruses 49 seasonal flu 49 neuraminidase inhibitors 48 virus infects 48 malaria parasite 48 drug resistant strains 48 prescribe antibiotics 48 immuno compromised 48 avian virus 47 Bekedam 47 avian flu virus 47 flus 47 H#N# influenza strain 47 H#N# subtype 47 infecting humans 47 latent infection 47 multidrug resistant 47 pandemic strain 47 reassortment 47 Antiviral drugs 47 bacterial strains 46 pneumococcus 46 bird flu virus 46 amantadine 46 H#N# virus 46 epidemics 46 C.difficile 46 Avian influenza 46 H#N# 46 Anne Schuchat 46 coronaviruses 46 virologists 46 St. Louis encephalitis 46 resistant strains 46 flu pandemics 46 Pandemic flu 46 vaccinated 46 bacterium 46 antiviral drugs 46 Antibiotic resistance 45 vaccines 45 pandemic H#N# 45 avian influenza virus 45 oseltamivir Tamiflu 45 easily transmissible 45 avian flu 45 contagious respiratory 45 transmissible 45 Anthony Fauci director 45 methicillin 45 S. pneumoniae 45 swine origin 45 seasonal influenza vaccine 45 H#N# avian flu 45 pandemics 45 mycobacteria 45 neuraminidase 45 highly contagious 45 H#N# swine 45 highly pathogenic H#N# 44 Wolbachia 44 pathogens 44 Lubroth 44 outbreaks 44 bird flu strain 44 Japanese encephalitis 44 rimantadine 44 Pandemics 44 LAIV 44 flu 44 H#N# avian influenza 44 superbug gene