Disconsolate passengers stuck on a cruise ship moored in Lisbon's port for five days due to a COVID-19 outbreak began disembarking early on Monday, focused on clearing the final hurdle of a negative test before boarding homebound flights.

The AIDAnova, carrying 2,844 passengers and 1,353 crew, had docked in Portugal's capital on Wednesday.

The ship was en route to the island of Madeira for New Year's Eve celebrations, but the cruise was cut short after COVID-19 was detected among the crew, 52 of whom tested positive between Wednesday and Friday.

68 Cases, Only a Few Passengers

By Monday 68 positive cases, including a handful among the passengers, had been detected, port captain Diogo Vieira Branco told the Lusa news agency.

The ship's German operator, Carnival Corp subsidiary AIDA Cruises, said all those infected had mild symptoms or none at all. All crew and guests over 12 had been fully vaccinated and been required to show a negative rapid antigen test before departure, it added.

Passengers who had again tested negative in the past 48 hours started to disembark before dawn and were being transported by bus to the city's airport in an operation expected to last most of the day.

"We're living in this situation and it can always happen. Of course it's not nice, we imagined something else," one calm but disappointed passenger said as he disembarked.

'We're Going Home'

"We all want this to end. We're going home," added another.

AIDA Cruises said it adhered to "comprehensive health and safety protocols" on all its cruises.

On Thursday, the U.S. Centers for Disease Control and Prevention advised people to avoid traveling on cruise ships regardless of their vaccination status.