![(FILES) In this file photo taken on March 15, 2020, travelers arrive at the international terminal of the O'Hare Airport in Chicago, Illinois. Air passengers bound for the US will require a negative Covid-19 test within three days of their departure, the Centers for Disease Control and Prevention (CDC) said on January 12, 2021. "Testing does not eliminate all risk but when combined with a period of staying at home and everyday precautions like wearing masks and social distancing, it can make travel safer," said CDC Director Robert Redfield. / AFP / KAMIL KRZACZYNSKI](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/4ATR7DF5NCIDZITGLF36Z5KYJY.jpg?smart=true&auth=69d55f0e419431baacde8a16e492d81e85a70f139b8b57251e51b434d1838665&width=400&height=225)
Travellers arrive at the international terminal of O'Hare Airport in Chicago, Illinois, March 15, 2020. AFP
Travellers arrive at the international terminal of O'Hare Airport in Chicago, Illinois, March 15, 2020. AFP
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