I disagree - there are many moving parts to dealing with Covid. Everyone impacted will have an opinion, but procedures will vary in different countries, etc. US airlines don’t mask on transatlantic flights and I believe that is a major factor. We have friends who did a 16 day transatlantic on Princess where masking wasn’t enforced and testing only done before disembarkation. They wound up having to quarantine in London a total of 2 weeks. I prefer Viking’s testing. Regardless, there will be a risk for at least the next few months - and possibly more testing (we had every other day on our Douro cruise last November - with zero positives).