Nations across world look to tighten borders as more Omicron cases pop up

Nations across the world are tightening their borders (Ariel Schalit/AP)

Governments have taken steps to tighten their borders as cases of the Omicron variant of coronavirus appeared in countries on opposite sides of the world.

Japan was the latest to take action as it said it will suspend the entry of all foreign visitors from around the world as the variant spreads.