機器
chemical
china
clothes
contagious
control
corona
coronavirus
dangerous
deadly
diagnosis
disease
employees
epidemic
flu
gloves
health
human
industrial
infection
influenza
italy
mask
medical
microbiology
occupation
one person
pandemic
person
place
pneumonia
pressure
prevention
protection
protective
public
quarantine
spray
spraying
spreading
suit
two
uniform
utility
viral
virus
warning
work
worker
working