We got off Anthem on Friday. My wife tested negative on Friday, but positive on Saturday after feeling like she had a cold. I'm still testing negative with no symptoms.
It's almost certainly attributed to the cruise, but we knew the risks before booking and wouldn't change a thing.
This is the first time either of us has caught Covid, and that includes living in a house when my son caught Covid a few months ago. I think you have to try & get on with living your life as normal as possible (but I haven't always have that opinion). I think the effectiveness of the vaccine has allowed us that luxury.