英文關鍵字
2019ncov
alert
attention
avoid
background
biohazard
caution
concept
contamination
corona
coronavirus
covid19
danger
dangerous
design
disease
disinfect
educational
epidemic
flu
getting
hands
health
icon
icons
illness
illustration
immunity
infected
infection
mask
outbreak
pandemic
pneumonia
poster
prevention
protection
quarantine
risk
safety
set
sickness
sign
silhouette
spread
steps
stop
surfaces
taken
template
virus
warning
wash
wear
white