Plague Ship?

This is the UK cruise ship Oriana, which was described by a passenger disembarking at Southampton as a 'plague ship'. Now, when you know the norovirus is about - and it's about a lot in the UK just recently - and you know that several hundred mainly elderly passengers on a cruise are a sitting target for the norovirus, you can do two things: cancel the cruise (not a good idea if you want to make money) or step up the hygiene on the ship (which is what the crew did). I'd say the Oriana's hands are clean in more ways than one. Though I'd love to know how the passenger recognised it as a plague ship.....