英文關鍵字
air
background
bacteria
breathing
care
caucasian
concept
corona
coronavirus
covid19
crown
danger
demonstrates
disease
epidemic
face
female
girl
hand
health
human
illness
infection
influenza
isolated
mask
medical
medicine
outbreak
pandemic
pathogens
people
prevent
prevention
protect
protection
protective
puts
quarantine
respiratory
safety
sick
sickness
spread
studio
surgical
that
transmission
viral
virus
wearing
woman