People attend the opening ceremony of a Christmas market, amid the coronavirus disease (COVID-19) pandemic, in Cologne, Germany, November 22, 2021.

A woman wearing a mandatory protective face mask passes by a heart-shaped ginger bread reading "Merry Christmas" at the Christmas market, as the spread of the coronavirus disease (COVID-19) pandemic continues, in Frankfurt, Germany, November 29, 2021.

People walk past an illuminated tree at a Christmas market in Strasbourg, France November 26, 2021.

Women make a toast while visiting a Christmas market as the spread of the coronavirus disease (COVID-19) continues in Berlin, Germany, November 30, 2021.

A sign showing mask requirement for visitors at the Christmas market is seen, as the spread of the coronavirus disease (COVID-19) pandemic continues, in Frankfurt, Germany, November 29, 2021.

Street market vendors participate in the annual Christmas parade, in La Paz, Bolivia November 26, 2021. Picture taken November 26, 2021.

People visit the Breitscheid square Christmas market, amid the coronavirus disease (COVID-19) pandemic, in Berlin, Germany, November 22, 2021.

A disinfectant dispenser is seen next to gingerbread hearts, as the spread of the coronavirus disease (COVID-19) continues, at the Christmas market in Giessen, Germany, November 19, 2021.

A view of the preparations at a Christmas market in Hamburg, Germany, November 16, 2021.

An employe of a Christmas market next to Cologne Cathedral checks a 2G rule status of visitors, as the spread of the coronavirus disease (COVID-19) continues in Cologne, Germany, December 1, 2021.

Visitors wear protective face mask to respect the coronavirus disease (COVID-19) regulations at a Christmas market in Tuileries Garden in Paris France, November 27, 2021.

Visitors walk at a Christmas market, amid the spread of the coronavirus disease (COVID-19) pandemic, on the Sechselaeutenplatz square in Zurich, Switzerland November 25, 2021.

People drink Gluhwein as they visit the Breitscheid square Christmas market, amid the coronavirus disease (COVID-19) pandemic, in Berlin, Germany, November 22, 2021.

An exhibitor prepares his Christmas Market booth at the Hauptmarkt in Nuremberg, Germany, November 18, 2021.

Visitors wear protective face masks to respect the coronavirus disease (COVID-19) regulations, as an Eiffel Tower light model is seen at a Christmas market in Tuileries Garden in Paris France, November 27, 2021.

A musician plays a piano at a Christmas market amid the coronavirus disease (COVID-19) pandemic, in Cologne, Germany, November 27, 2021.

People stand near closed booths after the traditional Christmas market has been closed due to the fourth national coronavirus disease (COVID-19) lockdown in Innsbruck, Austria, December 1, 2021.

The Christmas market is seen during its official opening as the spread of the coronavirus disease (COVID-19) continues, in Frankfurt, Germany, November 22, 2021.

A Christmas Market booth is prepared at the Hauptmarkt in Nuremberg, Germany, November 18, 2021.

People visit a booth offering decorations at a Christmas market open only for visitors who are vaccinated or recovered from the coronavirus disease (COVID-19), in Hamburg, Germany, December 1, 2021.