Talk about a close call at sea.
Carnival shares sank Thursday after the company said a potential case of the coronavirus on board a Costa Crociere ship docked at the Italian port of Civitavecchia, near Rome, was being investigated, and that all 7,000 passengers and crew were being quarantined.
Costa Crociere is a unit of Carnival.
Concern that a floating city of 7,000 could potentially be exposed to the killer virus sent other cruise and travel industry stocks lower on Thursday. Shares of Royal Caribbean (RCL) - Get Report also fell after it announced that three of its Spectrum of the Seas sailings departing from Shanghai were being canceled through Feb. 8.
But Carnival got the all-clear on Friday after authorities confirmed that the 54-year-old female passenger suspected of having contracted the virus actually had the flu, and that the remaining passengers and crew could proceed with their planned voyage.
The ship was bound for La Spezia in the Liguria region, with 1,000 crew and 6,000 passengers.
The ship had been in lockdown in Civitavecchia for most of the day Thursday as passengers waited for the initial results of tests carried out by a medical team from Rome's Lazzaro Spallanzani National Institute for Infectious Diseases.
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