英文關鍵字
adult
air
allergy
bacteria
breathing
camera
care
caucasian
corona
coronavirus
covid
crowd
danger
disease
doctor
epidemic
face
flu
happy
health
healthcare
human
hygiene
ill
illness
infection
influenza
lady
looking
mask
medical
medicine
outbreak
pandemic
person
pneumonia
pollution
prevention
protect
protection
protective
quarantine
respiratory
safety
sick
sickness
vaccine
virus
wearing
woman