英文關鍵字
2019ncov
alert
alpha
animation
background
biology
cartoon
caution
channel
china
chinese
clip
contamination
coronavirus
covid19
danger
dangerous
design
disease
epidemic
flat
flu
footage
global
health
human
infected
key
mask
medical
motion
ncov
outbreak
pandemic
people
png
protection
red
respiratory
risk
scene
science
spinning
symptoms
transparent
vaccine
video
virus
warning