Germany will be introducing new measures to curb the spread of COVID-19 before New Year's Eve, including limiting private gatherings for vaccinated people to a maximum of 10 people.
Clubs and discos will be closed and big events, including soccer matches, will only take place without spectators.
"I am happy I can get the booster today. Otherwise I wouldn't have had it until the end of January. And for someone from Cologne it is quite special to get it in Cologne's Cathedral, isn't it?," said Ute Sennewald while waiting.
Around 70.4% of Germany's population of about 83 million have been fully vaccinated with 32.6% having received a booster shot.