英文關鍵字
2019
access
accident
barricade
barrier
childhood
closed
control
coronaviridae
coronavirus
cov
covid
dangerous
disease
empty
end
entrance
entry
epidemic
forbidden
hazard
health
home
illness
isolation
ncov
pandemia
pandemic
playground
prevention
preventive
prophylaxis
protect
protection
public
quarantine
restricted
restriction
safety
sars
sign
stay
stop
striped
tape
warning