英文關鍵字
2019ncov
air
background
bacteria
biohazard
care
china
concept
contamination
corona
coronavirus
danger
disease
earth
environment
epidemic
fever
flu
global
globe
health
illness
infection
influenza
mask
medical
medicine
mers
nature
ncov
outbreak
pandemic
people
planet
pneumonia
pollution
protect
protection
quarantine
respiratory
safety
save
sick
sickness
vaccine
virus
warming
warning
who
world