英文關鍵字
2019
air
asthma
bacterium
bad
beard
biology
care
corona
coronavirus
cough
coughing
covid
covid19
danger
diagnosis
disease
epidemic
face
flu
health
human
illness
illustration
infection
male
man
mask
medical
medicine
microbiology
ncov
pandemic
patient
person
protect
quarantine
research
respiratory
rest
risk
sars
vaccine
viral
virus