Europe is racing to fight a surge in COVID-19 infections and the spread of the omicron variant, with some countries considering additional restrictions that would disrupt the Christmas and New Year’s holidays.

From a new lockdown in the Netherlands to travel restrictions targeted at the U.K. and emergency meetings scheduled for southern Europe, the continent faces a critical week.

The spread of the highly-transmissible omicron strain risks slamming populations already weary of restrictions. It also comes at a time some countries, like Germany and Austria, were just getting their latest waves under control.