The United States will tighten entry requirements in response to growing concerns over the new Omicron variant of Covid-19, according to President Joe Biden.
Passengers flying to the US will need to show a negative Covid-19 test within one day of departure.
The country recorded its first official Omicron case in California in a patient who had recently returned from South Africa.
The White House didn't say whether the test should be a rapid one or if it should be a traditional one.
The federal mask mandate on flights, trains, and other forms of public transport was extended by Biden.
The mandate was supposed to end on January 18th.
The new US international travel protocols are reassuring to American Express Global Business Travel chief commercial officer, Drew Crawley.
Since the start of the Pandemic, the industry has invested in traveller safety and wellbeing.
