英文關鍵字
abstract
allergy
antibacterial
bacteria
blue
buy
clean
concept
contamination
coronavirus
covid19
doctor
end
epidemic
falling
flu
goods
holding
home
infection
isolation
medical
minimal
modern
monochrome
motion
nobody
nurse
object
pandemic
panic
people
prevention
product
protection
quarantine
spreading
stayhome
supply
symbol
video
viral
virus