感染の危険性
animals
antidote
avian flu
avian influenza
bacteria
beak
bird flu
birds
clean
countermeasures
danger
disinfect
disinfection
epidemic
feathers
germ
germs
harm
health
health care system
human biology
hygiene
infection
infection rate
influenza
microbes
mortality rate
pandemic
pathogen
plague
precaution
precautionary measures
prevention
protection
pure
quarantine
risk
safety
safety at work
safety measures
species
sterilize
viral disease
virus
viruses
wings
zoonosis