I hadn't thought about COVID when I booked our March TA to Southampton...geez, wish I had. I've COVID twice (not while traveling) and it wasn't horrific (just long - 10 days the second time.) One issue I haven't seen is the matter of cabin stewards spreading it from room to room just from cleaning.
I haven't cruised for 9 years - do cabin stewards wear gloves or masks still (so long after the pandemic!)