英文關鍵字
adorable
air
allergy
animal
background
blue
bulldog
canine
care
clean
clinic
disease
doctor
dog
domestic
epidemic
face
flu
french
germ
global
health
hygiene
infect
infected
infection
infectious
isolated
mask
masks
medical
medicine
nose
pandemic
pet
pneumonia
pollution
prevention
protect
protection
protective
quarantine
respiratory
sick
surgery
vaccine
veterinary
virus
wearing