英文關鍵字
antibacterial
aseptic
awareness
bacterium
biology
bubble
care
clean
contagion
coronavirus
cough
dirty
disease
finger
hand
hands
health
hospital
human
hygiene
hygienic
illustration
infection
infographic
instructions
liquid
medical
nail
operation
palm
patient
prevention
procedure
rub
sanitizer
school
science
sink
soap
step
surgery
thumb
vector
wash
washing
water
wet