Just as many countries around the world were beginning to loosen their border restrictions, reports of a newly detected coronavirus variant in South Africa sent many of those doors slamming shut again.
원문출처 : https://www.cnn.com/travel/article/coronavirus-omicron-variant-travel-restrictions/index.html
원문출처 : https://www.cnn.com/travel/article/coronavirus-omicron-variant-travel-restrictions/index.html