airborne viruses
alcohol disinfection
antiseptic solution
blue
causative agents
check
color
contact infectious
disinfection
droplet infection
hand
hand washing
health
hospital
hygiene
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illustration
infection
mark
mask
material
measures
measures against infectious diseases
medical institutions
noncontact thermometer
pathogenic bacteria
prevention
set
simple
sterilization
temperature measurement
thermometer
thermometry
ventilation
virus
white back
windows