英文關鍵字
2019
black
breathing
business
care
caucasian
clinical
corona
coronaviridae
coronavirus
cough
cov
covid
danger
disassemble
disease
doctor
equipment
face
flu
from
grasp
health
hospital
hygiene
ill
illness
indoor
infection
influenza
lack
lifestyle
male
man
mask
medic
medicine
ncov
pandemic
pink
prevention
professional
protection
respirator
safety
sars
sick
surgical
treatment
uniform
virus
wearing