英文關鍵字
alone
care
closed
clothing
contagion
control
coronavirus
covid
danger
disease
epidemic
flu
focus
forest
glove
gloves
grass
hand
health
healthcare
holding
human
hygiene
illness
infection
jacket
looking
male
man
mask
medical
nature
outdoor
pandemic
people
plague
precaution
protection
protective
quarantine
safety
surgical
threat
towards
viral
virus
walking
wearing
worried