The Omicron variant is triggering a refreshing patchwork of nationwide vacation limitations all around the world, throwing up new hurdles to abroad vacation just as it was starting up to bounce again from very last year’s Covid-19 steps.

The U.S. is toughening up testing needs for inbound tourists, including U.S. citizens. Japan and Israel are barring nearly all international visitors for now. International locations across Europe and Asia have instituted new principles for worldwide travelers—including additional testing and quarantine needs.