Hungarian doctors and health care workers began getting vaccinated Saturday with one of the continent’s first shipments of the Pfizer-BioNTech coronavirus vaccine, upsetting the European Union’s plans for a coordinated rollout of the first shots across the 27-nation bloc on Sunday.

The first shipments of the vaccine arrived at hospitals across the EU in super-cold containers late Friday and early Saturday after being sent from a manufacturing center in Belgium before Christmas.

It was not immediately clear why Hungarian authorities began their vaccinations a day early. Authorities in Slovakia also announced that they planned to begin administering their first doses on Saturday evening. More around the globe happened. For more, watch the full video.