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