A further four passengers on SeaDream 1 have been diagnosed with Covid-19, Gene Sloan reports on Thepointsguy.com website.

"The number of confirmed cases of COVID-19 on the Caribbean cruise ship in the midst of a COVID outbreak has jumped to five. In addition, there is preliminary evidence that there may be a sixth case on board," he said in his report.

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A passenger on SeaDream 1 that belongs to SeaDream Yacht Club has received a preliminary positive test result for Covid-19, CNN reports, citing Gene Sloan, a senior reporter for cruise and travel at The Points Guy, who was aboard the ship.

SeaDream 1 is the first cruise vessel to resume sailing in the Caribbean since the start of the pandemic.

 “CNN Travel reached out to SeaDream on Wednesday afternoon for confirmation. The company said it would provide a statement but had not issued it to CNN as of 6:30 p.m. ET,” the broadcaster said

 The ship was anchored off Union Island in the Grenadines at the time of the announcement of the test result and was immediately headed back to Barbados, the report said.

SeaDream Yacht Club operates two boutique ships that both have accommodation for 112 passengers.