Originally Posted by
hdogan
You may need it for more than that, though. If anywhere in your destination country requires a Covid certificate, AFAIK same rules will apply, because there was an agreement on the Union level about the 270-day validity of vaccination certificates. So, if your destination requires certs to get into places, you'll either have to get tested, or get that booster shot.
My final destination in Scandinavia recently dropped all Covid restrictions for events, restaurants etc. Hence no other concerns other than the 2-hour transit layover in Germany.