International air passengers trying to enter the US will be required to present a recent negative Covid-19 test, as the country grows increasingly worried about the circulation of new more transmissible variants of the virus.
試圖入境美國的國際航班乘客,將被要求提供近期新型冠狀病毒核酸檢測陰性證明。美國正愈發擔憂更具傳染性的新病毒變種蔓延開來。
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