Related by context. Frequent words. (Click for all words.) 69 virulent 68 virulent strain 61 resistant strains 59 avian influenza viruses 59 viruses 58 drug resistant strains 58 transmissible 58 multidrug resistant 57 pathogen 56 influenza viruses 56 highly pathogenic 56 pathogens 55 Influenza viruses 55 flu viruses 55 viral strains 55 Infectious diseases 55 infect humans 54 pathogenic 54 H#N# viruses 54 antibiotic resistant strains 54 pandemic H#N# virus 54 virus 54 coronaviruses 54 Flu viruses 53 influenza virus 53 bacterial strains 53 bacterial pathogens 53 resistant pathogens 53 methicillin 53 S. pneumoniae 53 P. falciparum 52 pandemics 52 Nipah virus 52 Wolbachia 52 mutant strain 52 avian virus 51 influenza pandemics 51 highly pathogenic H#N# 51 epidemics 51 herpes viruses 51 Rift Valley fever 51 Superbugs 51 zoonotic 51 antibiotic resistant 51 zoonotic diseases 51 pandemic H#N# 51 Staphylococcus 51 pandemic H#N# influenza 51 bacterium 51 flu virus 51 C.difficile 51 H#N# strain 51 temperate regions 51 Avian influenza 50 temperate zones 50 Pathogens 50 serotypes 50 pneumococcus 50 H#N# influenza virus 50 retroviruses 50 Pandemics 50 Viruses 50 contagious disease 50 Clostridium 50 antibiotic resistant bacteria 50 pandemic strain 50 influenza strains 50 respiratory viruses 50 resistant bacteria 50 Streptococcus pneumoniae 50 infectious disease 50 serotype 50 Aspergillus 50 flu pandemics 50 contagious respiratory 50 bacillus 49 infectious organisms 49 staphylococcus 49 Epidemics 49 Mycobacterium tuberculosis 49 P. aeruginosa 49 Fujian strain 49 pandemic 49 Strep 49 superbugs 49 highly contagious 49 Salmonella bacteria 49 Noroviruses 49 H#N# avian influenza 49 H#N# avian flu 49 Ebola virus 49 food borne pathogens 49 coli 49 chytrid fungus 49 virulence 49 easily transmissible 49 antibiotic resistance 49 virus mutates 48 infectious diseases 48 Virus 48 Monkeypox