英文關鍵字
2019
adult
age
bacteria
care
caring
caucasian
close
copy
copyspace
coronavirus
covid
covid19
danger
disease
elder
elderly
epidemic
face
flu
health
healthcare
his
human
hygiene
hygienic
infect
infection
infectious
left
man
mask
medical
medicals
medicine
ncov
old
pandemic
pensioner
person
pneumonia
portrait
prevention
protection
protective
quarantine
respiratory
retired
retirement
risk
safety
senior
space
viral
virus
wears