One of the world's largest cruise lines is considering whether to make vaccination against COVID-19 a requirement for boarding.
More than 130,000 people have been vaccinated in the first week of the UK's vaccination programme, which began on December 8.
Frank Del Rio, the chief executive of Norwegian Cruise Line Holdings, said: "It will certainly be a requirement for the crew. But it's too early to tell whether we have the legal standing to mandate that you take a vaccine to come onboard – lawyers are looking at it as we speak.
"But there is talk beginning to emerge from different corners of the travel industry, the airlines as well, of requiring some kind of immunity passport demonstrating that you've had the virus or been vaccinated, so that you are good to go."