英文關鍵字
app
background
barcode
black
business
certificate
check
code
coding
communication
control
coronavirus
covid19
data
digital
disease
document
frame
health
identification
illustration
immunization
infection
information
international
internet
isolated
label
medicine
mobile
official
online
phone
qr
result
safety
scanner
scanning
screen
smartphone
technology
telephone
text
tourism
travel
vaccination
vaccine
virus