The ship, called Icon of the Seas, will debut in 2023.
The sailing marked just the beginning of Royal's comeback story.
The positive tests show just how effective its health and safety protocols are, Celebrity said.
While its christening is on hold, Mardi Gras is finally making its debut next month.
CDC rules allow for 5% of a cruise ship's guests to be unvaccinated.
The brand will officially hit the water in 2023.
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