Not if you've already had it. In all seriousness, that Venn between "had it" or "got the jab" is a vastly shrinking minority.
Furthermore, there was a story just this week about a woman caught COVID-19 around Thanksgiving and didn’t show any symptoms. She then got the Johnson and Johnson vaccine in April. Now, she’s having to quarantine again after she tested positive for COVID-19.
Now what is interesting, is that you have cruise regulars who haven't cruised in nearly 2 years, and that amount of time likely permitted common cruise ship norovirii to mutate into something fresh...
Obviously those who've had covid should be treated the same as vaccinated, it's my understanding the immunity is similar. Unfortunately the government doesn't recognize that, so in this case uncomfortable, you have to wear a mask at all times, and risky in the sense that if you have a positive test onboard, you'll probably be disembarked.
I wonder how many people who “tested positive” got that verdict from a false positive. The extremely high number of amplification cycles permitted in PCR tests led to many false positives. Of course, a person does not get antibodies or immunity with a false positive. Are these a big proportion of people getting Covid twice?