Ключевые слова: background, box, building, cabinet, class, classroom, clean, college, colorful, corridor, disease, door, education, educational, empty, entrance, floor, hall, hallway, high, high school, inability, indoor, inside, institutions, interior, lobby, lock, locker, lockers, nobody, organize, outbreak, pandemic, perspective, public, pupil, room, safe, school, side, situation, staircase, storage, student, thailand, university, walkway, wall, wooden,