英文關鍵字
america
american
animation
bio
care
caution
concept
contagious
contamination
corona
coronavirus
covid19
cross
cure
danger
disease
emergency
epidemic
fever
flag
flu
hazard
health
healthcare
icon
illness
infected
infection
loop
loopable
medical
medicine
nation
protect
protection
quarantine
research
safety
seamless
sick
sickness
sign
symbol
tape
text
usa
vaccine
virus
warning
yellow