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![Employees wear masks inside Samsung Electronics' Suwon Campus on Thursday. A day earlier, a woman in her 50s in charge of cleaning a research lab building on the campus was confirmed to have Covid-19. In response, Samsung Electronics closed down the building where she worked and made 1,200 employees work from home. [YONHAP]](https://image.koreajoongangdaily.com/11888662.jpg?imageId=11888662&width=240&height=184&format=webp&format=jpg)