air
antibacterial
antiseptic
background
blackboard
board
care
caucasian
class
classroom
clinic
doctor
education
epidemic
flu
green
health
hygiene
lab
lamp
lifestyle
light
medical
medical mask
medicine
new normal
nurse
patient
person
problem
professional
protection
quarantine
sanitizer
school
scientist
sign
sterilizer
stethoscope
study
teacher
ultra
ultraviolet
uv
white
woman
work
定額
School nurse showing an ultraviolet lamp in a casing for air disinfection in a classroom. The problem with lessons in the classroom during the virus outbreakの素材 [FY310165713303]
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