ampoule
aquarium
breakdown
close
closure
cloud
cloudy
concept
contagion
contamination
coronavirus
cov
covid
defend
disaster
disease
environment
exit
external
fish
forbid
forbidden
go out
goldfish
hide
hiding
home
indoor
infection
isolation
nature
outdoor
pollution
precaution
prevent
prevention
protect
protected
protection
quarantine
safe
sars
secure
sick
stop
storm
threat
transmission
viral
virus