英文關鍵字
2019
boy
breathing
care
caucasian
color
corona
coronaviridae
coronavirus
cov
covid
danger
disease
environment
face
flu
handsome
health
hygiene
ill
illness
infection
influenza
isolated
lifestyle
male
man
mask
medicine
ncov
outdoor
pandemic
people
pollution
portrait
prevention
professional
protection
respirator
safety
sars
sick
sunset
surgical
threat
treatment
turquoise
uniform
virus
warm
wearing
white