![(FILES) In this file photo the United check-in counter is seen in an unusually deserted airport terminal at San Francisco International Airport in San Francisco, California on August 2, 2020 amid the coronavirus pandemic. In addition to requiring a test before they fly, travelers to the US will need to quarantine upon arrival, US President Joe Biden said January 21 as he announced a raft of measures aimed at containing the spread of Covid-19. / AFP / Daniel SLIM](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/DRHBGY2AS4DEX2DO6UXIZVVHO4.jpg?smart=true&auth=8b4d48feb501c4e3d8025675b7eca8e71375b240a530f2181aa850db93211a98&width=400&height=225)
The United check-in counter at San Francisco International Airport in San Francisco, California, August 2, 2020. AFP
The United check-in counter at San Francisco International Airport in San Francisco, California, August 2, 2020. AFP
US enacts strict Covid testing requirement for entry
American citizens and non-citizens must test negative at least three days before boarding flight