A cruise ship returns to Miami with 48 cases of Covid-19.

U.S.|A cruise vessel returns to Miami with 48 cases of Covid-19.

• Dec. 20, 2021, 10:03 a.m. ET

Dozens of passengers and unit members aboard a Royal Caribbean cruise vessel tested affirmative for Covid-19 past week, according to the cruise line.

Royal Caribbean International said successful a connection that the ship, the Symphony of the Seas, was carrying much than 6,000 guests and unit members erstwhile 48 radical onboard tested positive.

The vessel departed connected Dec. 11 for a seven-night Caribbean cruise and returned to larboard successful Miami connected Saturday, the institution said.

The cases were identified due to the fact that of interaction tracing aft a impermanent tested positive, the cruise enactment said.

“Each idiosyncratic rapidly went into quarantine,” the connection said. “Everyone who tested affirmative was asymptomatic oregon mildly symptomatic, and we continuously monitored their health.”

The cruise enactment said that the vessel sailed with 95 percent of its guests aboard afloat vaccinated and that 98 percent of the radical who tested affirmative were afloat vaccinated. It was not instantly wide whether immoderate of the radical who tested affirmative had received a booster changeable of a Covid-19 vaccine.

Royal Caribbean requires travelers 12 and older to beryllium afloat vaccinated against Covid-19 and trial antagonistic earlier boarding the ship. Children who are not yet vaccinated indispensable supply a antagonistic P.C.R. trial effect earlier sailing and trial antagonistic astatine the terminal earlier boarding.

The institution said that each its unit members were afloat vaccinated against Covid-19 and were tested weekly.

During the aboriginal days of the pandemic successful 2020, outbreaks connected cruise ships sickened hundreds of people and upended the tourism industry, arsenic officials and companies struggled to support crews and passengers safe.

For months, cruise ships were barred from sailing to galore ports. Even aft vaccinations became much wide disposable successful the United States successful April, allowing overmuch of the question manufacture to ramp up again, cruise ships remained docked successful ports, costing the manufacture billions of dollars each month.

The cruise manufacture rebounded successful the summer, with galore companies reporting an summation successful bookings and a amended grip connected Covid-19 protocols.

But a caller spike successful Covid cases in parts of the United States and Europe and increasing concerns implicit the Omicron variant may hinder that momentum.

This month, astatine slightest 17 coronavirus cases were identified connected a Norwegian Breakaway cruise vessel that docked successful New Orleans, including a lawsuit of the caller Omicron variant.