Related by context. Frequent words. (Click for all words.) 69 virus mutates 62 Influenza viruses 60 flu viruses 59 mutates 58 infects humans 58 Flu viruses 58 influenza viruses 57 influenza virus 57 BCG vaccine 57 avian flu viruses 57 pandemic strain 56 virus mutating 56 flu strains 56 H#N# viruses 56 viral strains 55 flu virus 55 bacterium 55 mutate 55 Wolbachia 55 virus infects 55 herpes viruses 54 causes chickenpox 54 pneumococcus 54 pneumococcal bacteria 54 avian influenza viruses 53 infect humans 53 Antibiotic resistance 53 malaria parasite 53 H#N# strain 53 infecting humans 52 latent infection 52 immuno compromised 52 coronaviruses 52 bacterial strains 52 mutating 52 mycobacteria 52 neuraminidase 52 Antiviral drugs 52 viruses 52 multidrug resistant 52 reinfection 52 strep bacteria 51 varicella zoster virus 51 neuraminidase inhibitors 51 influenza 51 influenza strains 51 Toxoplasma 51 virus 51 recombinant vaccine 51 zoonotic disease 51 transfused blood 51 S. pneumoniae 51 Salmonella bacteria 50 highly pathogenic 50 easily transmissible 50 metabolizes 50 mycoplasma 50 metabolise 50 rhinoviruses 50 P. falciparum 50 antiviral therapies 50 transmissibility 50 swine flu virus 50 avian influenza virus 50 H#N# avian flu 50 Seasonal influenza 50 anthrax toxin 50 dengue virus 50 bacteria 50 Tularemia 50 chickenpox virus 49 organism 49 retrovirus 49 mutated 49 vaccine 49 Mycobacterium tuberculosis 49 Chlamydia trachomatis 49 transmissible 49 prion diseases 49 rotavirus infection 49 mutant strain 49 vaccines 49 avian flu virus 49 S. aureus infections 49 CMV infection 49 lactobacillus 49 influenza pandemics 49 drug resistant strains 49 pathogen 49 virulent strains 49 VLPs 49 Plasmodium falciparum 49 herpes virus 48 coronavirus 48 resistant strains 48 infects 48 pandemic H#N# virus 48 mAbs 48 serotype 48 latent TB infection 48 prescribe antibiotics