De Croo took to Twitter after Johnson tweeted his thanks “to our NHS, to all of the scientists who worked so hard to develop this vaccine, to all the volunteers” and more as the first vaccines have been administered on what Health Secretary Matt Hancock is calling V-Day.
A large part of the vaccine, which was developed by Pfizer and BioNTech, was in fact produced in Belgium.
De Croo’s dig comes as chief European Brexit negotiator Michel Barnier has set the deadline for a last-minute trade agreement between the EU and the UK for Wednesday, on the eve of a European summit which will either draft the broad outlines of an agreement or see emergency measures get put in place.
While the UK officially left the EU at the end of January, it remains part of the EU’s single market and customs union until 31 December.
If they fail to reach an agreement, World Trade Organisation (WTO) rules will apply between the two, meaning the introduction of higher tariffs and extensive customs controls.