Travel news this week: Why the Omicron variant set off a fresh round of travel restrictions around the world

Countries around the world imposed travel restrictions after the discovery of a new Covid-19 variant in South Africa, more than 2.3 million Americans traveled by air on a single day for Thanksgiving, and in Asia-Pacific, New Zealand and the Philippines revealed new reopening plans.

Countries around the world imposed travel restrictions after the discovery of a new Covid-19 variant in South Africa, more than 2.3 million Americans traveled by air on a single day for Thanksgiving, and in Asia-Pacific, New Zealand and the Philippines revealed new reopening plans.