Medical workers prepare to conduct Covid-19 tests at a pop-up screening clinic in front of Seoul Station in Seoul, South Korea, 23 December 2021. South Korea's new Covid-19 cases fell below 7,000 but critical cases and deaths surged to record highs of 1,083 and 109, respectively, amid concerns over the spread of the new omicron variant. (Photo by Yonhap/EPA/EFE)
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