Video: P&O apologise for Oriana norovirus outbreak P&O confirmed 300 passengers, who paid up to £4,000-a-head for the ten-day Baltic tour, had been sick with the bug. They reported restaurants on the board the ship were operating only limited service during their stay. The luxury liner's owners Carnival UK have offered to waive fees for anyone who had to visit the on-board doctor. Ms Marlow apologised to passengers whose holiday had been ruined by outbreak of norovirus on the cruise liner. She said: "Unfortunately we have had some incidents of norovirus, the common sickness bug, on-board the ship. It is prevalent at the moment in the UK and cruise ships are not immune to that. She added: "I'm just sorry that anyone has had sickness on-board one of our ships or on their holiday in general. It's a horrible thing to have.