英文關鍵字
virus
coronavirus
covid19
background
screensaver
animation
glitch
particles
video
medicine
disease
news
bacteria
medical
health
quarantine
sign
biology
illness
warning
microbiology
bacterium
corona
symbol
vaccine
science
caution
pneumonia
2019ncov
pathogen
security
protection
outbreak
cell
threat
biohazard
dangerous
flu
yellow
microscopic
zone
viral
influenza