United States President, Joe Biden has announced stricter Covid-19 travel rules.
Biden announced that from next week, international travelers to the US, including Americans, must get a Covid test, 24 hours before they depart.
He added that mask requirements on planes, trains and buses will be extended until mid-March.
Ten cases of the Omicron variant have been detected in the US: in California, Colorado, Minnesota, and New York, and in Hawaii.