英文關鍵字
mask
virus
person
pandemic
lifestyle
disease
danger
street
epidemic
sickness
coronavirus
pollution
man
health
face
corona
crowd
illness
medical
video
crisis
unemployment
medicine
protection
protective
safety
care
air
outdoor
black
city
covid
infection
covid19
bacteria
fear
flow
flu
influenza
meditation
prevention
problem
quarantine
respiratory
rush
sick
environmental
society
vaccine