英文關鍵字
casual
clean
confident
control
coronavirus
covid
defense
degree
demonstrates
denial
dentist
disease
disposable
doctor
epidemic
europe
european
ffp
flu
forbidden
germany
hand
health
hospital
individual
infection
laboratory
limit
mask
medical
medicine
nurse
patients
pharmacist
physician
prohibited
protect
protection
protective
research
respirator
sanitation
science
security
stop
surgeon
surgery
symptoms
treatment
virus