Two cruise passengers onboard a Royal Caribbean-operated ship have tested positive to coronavirus, despite a requirement that all passengers be fully vaccinated.
The guests were sharing a room on the Celebrity Millennium ship and returned positive tests before finishing a week-long trip in the Caribbean, starting and finishing at St Maarten.
Mandatory end-of-trip testing was required 72 hours before disembarkation.
All crew and adult passengers had to show proof that they were fully vaccinated and provide a negative Covid test prior to or at the time of boarding, ABC News in the US reported.
The guests are asymptomatic and currently in isolation, Royal Caribbean said. They are also being monitored by the company's medical team.
The ship is due to arrive back in St Maarten on Saturday, with the cruise operator currently conducting contact tracing and expediting testing for all close contacts of the individuals.
Celebrity Millennium was one of the first cruises in North America to restart sailing last week, after more than a year.
Cruise operators are among the last to return to their pre-pandemic operations as the Centers for Disease Control and Prevention (CDC) laid out strict guidance earlier this year for the cruise industry for resuming trips, after some ships became hotbeds for the virus last year.
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