"Everyone should get vaccinated, it's an ethical choice, because it puts their health, their life, but also the lives of others at risk," the pontiff said.
With many EU countries struggling to get people vaccinated against COVID-19 as fast as citizens might like, Belgium is re-evaluating its strategy.
The Danish court announced the monarch had received the first injection of the Pfizer/BioTech coronavirus vaccine.
The figures came as the UK changed its vaccinate rollout strategy to ensure more people receive a first dose earlier.
The registry, which will be shared with the EU, will not be made public and will be "done with the utmost respect for data protection," the country's health minister said.
The chief executive of the pharmaceutical giant assured that the vaccine developed with Oxford University should be effective against the new coronavirus strain sweeping the UK.