英文關鍵字
america
area
background
bacteria
biohazard
care
corona
coronavirus
covid
covid19
danger
disease
epidemic
epidemiologist
exclusion
flag
flu
global
health
healthcare
human
illness
infected
infection
mask
medical
medicine
pandemic
pneumonia
portrait
prevention
protect
protection
protective
quarantine
respirator
respiratory
safety
selfisolation
sick
sickness
sign
signal
tape
tragedy
usa
virus
warning
woman
zone