英文關鍵字
attention
banner
care
caution
corona
coronavirus
covering
design
distancing
door
entrance
entry
face
facemask
graphic
health
human
icon
illustration
information
instruction
mandatory
mask
measure
medical
must
necessary
pandemic
person
pictogram
prevention
protection
quarantine
required
right
safe
safety
security
service
sign
simple
stop
symbol
vector
virus
warning
wear
worn