I'm on the Rotterdam right now, doesn't seem to be any rhyme or reason to mask wearing. People are wearing them, people are not. I have yet to see it actually enforced upon someone not wearing a mask. I just stopped caring altogether, we have only been on 1 ship sponsored excursion to Berlin, for fear of postponents on the train back from Berlin, I would say it was 50% wearing a mask on the bus for 3 hours, then 10% wearing 1 on the way back. If there are covid concerns on the ship, I am unaware of them. We will be on for another 20 days through Norway, if we get stuck so be it. We have been through tons of museums, restaurants, public indoor spaces and have not seen any mask wearing in Berlin and Stockholm. I could be ground Zero for the virus, I have no idea, I could be a walking, talking, sneezing, asymptomatic time bomb, or maybe my wife is, and no one is the wiser. Again, I'm through caring. If you are going to be traveling and this is something you are worried about, I will tell you, you won't be able to avoid it, it will find you, no matter the precautions.