英文關鍵字
covid19
passport
status
vaccination
digital
smartphone
virus
test
business
online
background
cellphone
disease
certificate
document
qr
antibody
internet
web
infection
id
mobile
control
antivirus
display
safety
concept
prevention
holding
object
care
technology
pandemic
medicine
immunization
protection
app
corona
diagnostic
coronavirus
health
security
screen
epidemic
medical
indoor